# Dithering issue with AMD graphic card (Linux - Ubuntu) **URL:** \ **Category:** Hardware\ **Created:** [March 19, 2021, 11:22am UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760 "2021-03-19T11:22:39Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:02pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/21 "2021-03-30T13:02:32Z")
OK. Then I continue with the tests. As first thing, I attach the complete output from the `DatapixxGPUDitherpatternTest`: BitsPlusPlus: Could not find a Bits# config file under [/home/ziadhafed/.Psychtoolbox/BitsSharpConfig.txt]. Assuming a Bits+ device instead of a Bits# is connected. BitsPlusPlus: Please create a config file under this name if you have a Bits# and want to use it as Bits# instead of as a Bits+. BitsPlusPlus: The most simple way is to create an empty file. A more robust way is to store the name of the Bits# serial port BitsPlusPlus: in the first line of the text file, e.g., COM5 [Windows], or /dev/ttyACM0 [Linux] or similar. RandR: 1920x1080\_120.00 (0x9d) 368.8MHz h: width 1920 start 2072 end 2288 total 2656 skew 0 v: height 1080 start 1081 end 1084 total 1157 PTB-INFO: This is Psychtoolbox-3 for GNU/Linux X11, under Matlab 64-Bit (Version 3.0.17 - Build date: Oct 31 2020). PTB-INFO: OS support status: Linux 5.4.0-70-lowlatency Supported. PTB-INFO: Type ‘PsychtoolboxVersion’ for more detailed version information. PTB-INFO: Most parts of the Psychtoolbox distribution are licensed to you under terms of the MIT License, with PTB-INFO: some restrictions. See file ‘License.txt’ in the Psychtoolbox root folder for the exact licensing conditions. PTB-INFO: For information about paid priority support, community membership and commercial services, please type PTB-INFO: ‘PsychPaidSupportAndServices’. PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E DMI3 Registers] with class x00060000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CBDMA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E MM/Vt-d Configuration Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E RAS] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E IOAPIC] with class x00080020 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Ubox Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Ubox Registers] with class x00110100 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Ubox Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series/Z370 Chipset Family USB 3.0 xHCI Controller] with class x000c0330 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series PCH Thermal Subsystem] with class x00118000 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series PCH CSME HECI #1] with class x00078000 … PTB-DEBUG: Checking PCI device [Intel Corporation C600/X79 series chipset SATA RAID Controller] with class x00010400 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series PCH PCI Express Root Port #5] with class x00060400 … PTB-DEBUG: Checking PCI device [Intel Corporation X299 Chipset LPC/eSPI Controller] with class x00060100 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series/Z370 Chipset Family Power Management Controller] with class x00058000 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series PCH HD Audio] with class x00040300 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series/Z370 Chipset Family SMBus Controller] with class x000c0500 … PTB-DEBUG: Checking PCI device [Intel Corporation 200 Series/Z370 Chipset Family SPI Controller] with class x00000000 … PTB-DEBUG: Checking PCI device [Intel Corporation Ethernet Connection (2) I219-V] with class x00020000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCI Express Root Port A] with class x00060400 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E VT-d] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E RAS Configuration Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E IOxAPIC Configuration Registers] with class x00080020 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E CHA Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCU Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E PCI Express Root Port A] with class x00060400 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E VT-d] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E RAS Configuration Registers] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E IOxAPIC Configuration Registers] with class x00080020 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LM Channel 1] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMS Channel 1] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMDP Channel 1] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E DECS Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LM Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMS Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMDP Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E Integrated Memory Controller] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LM Channel 1] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMS Channel 1] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMDP Channel 1] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E DECS Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LM Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMS Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Intel Corporation Sky Lake-E LMDP Channel 2] with class x00088000 … PTB-DEBUG: Checking PCI device [Advanced Micro Devices, Inc. [AMD] (null)] with class x00060400 … PTB-DEBUG: Checking PCI device [Advanced Micro Devices, Inc. [AMD] (null)] with class x00060400 … PTB-DEBUG: Checking PCI device [Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XT [Radeon PRO WX 9100]] with class x00030000 … PTB-INFO: Advanced Micro Devices, Inc. [AMD/ATI] - Vega 10 XT [Radeon PRO WX 9100] GPU found. Trying to establish low-level access… PTB-DEBUG: Mapping GPU BAR address 0xc6000000 … PTB-DEBUG: Mapping 0x80000 bytes… PTB-INFO: Connected to Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XT [Radeon PRO WX 9100] GPU with DCE-12.0 display engine [6 heads]. PTB-INFO: Trying to detect screenId to display head mapping for screenid 0 … … probing for video output 0 … PsychOSKDGetLUTState(): Checking LUT and bias values on GPU for headId 0. PsychOSKDGetLUTState(): Skipping headId 0 as it is disabled [EVERGREEN\_GRPH\_ENABLE]. PsychOSKDGetLUTState(): Checking LUT and bias values on GPU for headId 1. PsychOSKDGetLUTState(): headId 1 [Offset 0x5ab4] uses old modesetting with REGAMMA\_LUT [0]. PsychOSKDOffsets: Black 0 : White 65535. 0:0,0,0 1:0,0,0 2:0,0,0 3:0,0,0 4:0,0,0 5:0,0,0 6:0,0,0 7:0,0,0 8:0,0,0 9:0,0,0 10:0,0,0 11:0,0,0 12:0,0,0 13:0,0,0 14:0,0,0 15:0,0,0 16:0,0,0 17:0,0,0 18:0,0,0 19:0,0,0 20:0,0,0 21:0,0,0 22:0,0,0 23:0,0,0 24:0,0,0 25:0,0,0 26:0,0,0 27:0,0,0 28:0,0,0 29:0,0,0 30:0,0,0 31:0,0,0 32:0,0,0 33:0,0,0 34:0,0,0 35:0,0,0 36:0,0,0 37:0,0,0 38:0,0,0 39:0,0,0 40:0,0,0 41:0,0,0 42:0,0,0 43:0,0,0 44:0,0,0 45:0,0,0 46:0,0,0 47:0,0,0 48:0,0,0 49:0,0,0 50:0,0,0 51:0,0,0 52:0,0,0 53:0,0,0 54:0,0,0 55:0,0,0 56:0,0,0 57:0,0,0 58:0,0,0 59:0,0,0 60:0,0,0 61:0,0,0 62:0,0,0 63:0,0,0 64:0,0,0 65:0,0,0 66:0,0,0 67:0,0,0 68:0,0,0 69:0,0,0 70:0,0,0 71:0,0,0 72:0,0,0 73:0,0,0 74:0,0,0 75:0,0,0 76:0,0,0 77:0,0,0 78:0,0,0 79:0,0,0 80:0,0,0 81:0,0,0 82:0,0,0 83:0,0,0 84:0,0,0 85:0,0,0 86:0,0,0 87:0,0,0 88:0,0,0 89:0,0,0 90:0,0,0 91:0,0,0 92:0,0,0 93:0,0,0 94:0,0,0 95:0,0,0 96:0,0,0 97:0,0,0 98:0,0,0 99:0,0,0 100:0,0,0 101:0,0,0 102:0,0,0 103:0,0,0 104:0,0,0 105:0,0,0 106:0,0,0 107:0,0,0 108:0,0,0 109:0,0,0 110:0,0,0 111:0,0,0 112:0,0,0 113:0,0,0 114:0,0,0 115:0,0,0 116:0,0,0 117:0,0,0 118:0,0,0 119:0,0,0 120:0,0,0 121:0,0,0 122:0,0,0 123:0,0,0 124:0,0,0 125:0,0,0 126:0,0,0 127:0,0,0 128:0,0,0 129:0,0,0 130:0,0,0 131:0,0,0 132:0,0,0 133:0,0,0 134:0,0,0 135:0,0,0 136:0,0,0 137:0,0,0 138:0,0,0 139:0,0,0 140:0,0,0 141:0,0,0 142:0,0,0 143:0,0,0 144:0,0,0 145:0,0,0 146:0,0,0 147:0,0,0 148:0,0,0 149:0,0,0 150:0,0,0 151:0,0,0 152:0,0,0 153:0,0,0 154:0,0,0 155:0,0,0 156:0,0,0 157:0,0,0 158:0,0,0 159:0,0,0 160:0,0,0 161:0,0,0 162:0,0,0 163:0,0,0 164:0,0,0 165:0,0,0 166:0,0,0 167:0,0,0 168:0,0,0 169:0,0,0 170:0,0,0 171:0,0,0 172:0,0,0 173:0,0,0 174:0,0,0 175:0,0,0 176:0,0,0 177:0,0,0 178:0,0,0 179:0,0,0 180:0,0,0 181:0,0,0 182:0,0,0 183:0,0,0 184:0,0,0 185:0,0,0 186:0,0,0 187:0,0,0 188:0,0,0 189:0,0,0 190:0,0,0 191:0,0,0 192:0,0,0 193:0,0,0 194:0,0,0 195:0,0,0 196:0,0,0 197:0,0,0 198:0,0,0 199:0,0,0 200:0,0,0 201:0,0,0 202:0,0,0 203:0,0,0 204:0,0,0 205:0,0,0 206:0,0,0 207:0,0,0 208:0,0,0 209:0,0,0 210:0,0,0 211:0,0,0 212:0,0,0 213:0,0,0 214:0,0,0 215:0,0,0 216:0,0,0 217:0,0,0 218:0,0,0 219:0,0,0 220:0,0,0 221:0,0,0 222:0,0,0 223:0,0,0 224:0,0,0 225:0,0,0 226:0,0,0 227:0,0,0 228:0,0,0 229:0,0,0 230:0,0,0 231:0,0,0 232:0,0,0 233:0,0,0 234:0,0,0 235:0,0,0 236:0,0,0 237:0,0,0 238:0,0,0 239:0,0,0 240:0,0,0 241:0,0,0 242:0,0,0 243:0,0,0 244:0,0,0 245:0,0,0 246:0,0,0 247:0,0,0 248:0,0,0 249:0,0,0 250:0,0,0 251:0,0,0 252:0,0,0 253:0,0,0 254:0,0,0 255:0,0,0 found GPU hardware headId 1 for output 0. Done. PTB-INFO: Trying to detect screenId to display head mapping for screenid 1 … … probing for video output 0 … PsychOSKDGetLUTState(): Checking LUT and bias values on GPU for headId 0. PsychOSKDGetLUTState(): Skipping headId 0 as it is disabled [EVERGREEN\_GRPH\_ENABLE]. PsychOSKDGetLUTState(): Checking LUT and bias values on GPU for headId 1. PsychOSKDGetLUTState(): headId 1 [Offset 0x5ab4] uses old modesetting with REGAMMA\_LUT [0]. PsychOSKDOffsets: Black 0 : White 65535. 0:0,0,0 1:0,0,0 2:0,0,0 3:0,0,0 4:0,0,0 5:0,0,0 6:0,0,0 7:0,0,0 8:0,0,0 9:0,0,0 10:0,0,0 11:0,0,0 12:0,0,0 13:0,0,0 14:0,0,0 15:0,0,0 16:0,0,0 17:0,0,0 18:0,0,0 19:0,0,0 20:0,0,0 21:0,0,0 22:0,0,0 23:0,0,0 24:0,0,0 25:0,0,0 26:0,0,0 27:0,0,0 28:0,0,0 29:0,0,0 30:0,0,0 31:0,0,0 32:0,0,0 33:0,0,0 34:0,0,0 35:0,0,0 36:0,0,0 37:0,0,0 38:0,0,0 39:0,0,0 40:0,0,0 41:0,0,0 42:0,0,0 43:0,0,0 44:0,0,0 45:0,0,0 46:0,0,0 47:0,0,0 48:0,0,0 49:0,0,0 50:0,0,0 51:0,0,0 52:0,0,0 53:0,0,0 54:0,0,0 55:0,0,0 56:0,0,0 57:0,0,0 58:0,0,0 59:0,0,0 60:0,0,0 61:0,0,0 62:0,0,0 63:0,0,0 64:0,0,0 65:0,0,0 66:0,0,0 67:0,0,0 68:0,0,0 69:0,0,0 70:0,0,0 71:0,0,0 72:0,0,0 73:0,0,0 74:0,0,0 75:0,0,0 76:0,0,0 77:0,0,0 78:0,0,0 79:0,0,0 80:0,0,0 81:0,0,0 82:0,0,0 83:0,0,0 84:0,0,0 85:0,0,0 86:0,0,0 87:0,0,0 88:0,0,0 89:0,0,0 90:0,0,0 91:0,0,0 92:0,0,0 93:0,0,0 94:0,0,0 95:0,0,0 96:0,0,0 97:0,0,0 98:0,0,0 99:0,0,0 100:0,0,0 101:0,0,0 102:0,0,0 103:0,0,0 104:0,0,0 105:0,0,0 106:0,0,0 107:0,0,0 108:0,0,0 109:0,0,0 110:0,0,0 111:0,0,0 112:0,0,0 113:0,0,0 114:0,0,0 115:0,0,0 116:0,0,0 117:0,0,0 118:0,0,0 119:0,0,0 120:0,0,0 121:0,0,0 122:0,0,0 123:0,0,0 124:0,0,0 125:0,0,0 126:0,0,0 127:0,0,0 128:0,0,0 129:0,0,0 130:0,0,0 131:0,0,0 132:0,0,0 133:0,0,0 134:0,0,0 135:0,0,0 136:0,0,0 137:0,0,0 138:0,0,0 139:0,0,0 140:0,0,0 141:0,0,0 142:0,0,0 143:0,0,0 144:0,0,0 145:0,0,0 146:0,0,0 147:0,0,0 148:0,0,0 149:0,0,0 150:0,0,0 151:0,0,0 152:0,0,0 153:0,0,0 154:0,0,0 155:0,0,0 156:0,0,0 157:0,0,0 158:0,0,0 159:0,0,0 160:0,0,0 161:0,0,0 162:0,0,0 163:0,0,0 164:0,0,0 165:0,0,0 166:0,0,0 167:0,0,0 168:0,0,0 169:0,0,0 170:0,0,0 171:0,0,0 172:0,0,0 173:0,0,0 174:0,0,0 175:0,0,0 176:0,0,0 177:0,0,0 178:0,0,0 179:0,0,0 180:0,0,0 181:0,0,0 182:0,0,0 183:0,0,0 184:0,0,0 185:0,0,0 186:0,0,0 187:0,0,0 188:0,0,0 189:0,0,0 190:0,0,0 191:0,0,0 192:0,0,0 193:0,0,0 194:0,0,0 195:0,0,0 196:0,0,0 197:0,0,0 198:0,0,0 199:0,0,0 200:0,0,0 201:0,0,0 202:0,0,0 203:0,0,0 204:0,0,0 205:0,0,0 206:0,0,0 207:0,0,0 208:0,0,0 209:0,0,0 210:0,0,0 211:0,0,0 212:0,0,0 213:0,0,0 214:0,0,0 215:0,0,0 216:0,0,0 217:0,0,0 218:0,0,0 219:0,0,0 220:0,0,0 221:0,0,0 222:0,0,0 223:0,0,0 224:0,0,0 225:0,0,0 226:0,0,0 227:0,0,0 228:0,0,0 229:0,0,0 230:0,0,0 231:0,0,0 232:0,0,0 233:0,0,0 234:0,0,0 235:0,0,0 236:0,0,0 237:0,0,0 238:0,0,0 239:0,0,0 240:0,0,0 241:0,0,0 242:0,0,0 243:0,0,0 244:0,0,0 245:0,0,0 246:0,0,0 247:0,0,0 248:0,0,0 249:0,0,0 250:0,0,0 251:0,0,0 252:0,0,0 253:0,0,0 254:0,0,0 255:0,0,0 found GPU hardware headId 1 for output 0. Done. PTB-INFO: Using old-style override-redirect (=1) setup path for onscreen window creation. PTB-INFO: GLX Visual info depths is 24 bits PTB-INFO: Running on Mesa version 20.2.6 PTB-INFO: This combo of X-Server and Mesa is considered safe for use under DRI3/Present. PTB-INFO: Using GLEW version 2.1.0 for automatic detection of OpenGL extensions… PTB-INFO: Using GLX\_MESA\_swap\_control extension for control of vsync. PTB-INFO: Disabling VRR Variable Refresh Rate mode for this fullscreen window on Mesa graphics driver. PTB-INFO: INTEL\_swap\_event support for additional swap completion correctness checks enabled. PTB-INFO: Fixed point precision integer framebuffer enabled. PTB-INFO: System Frame buffer provides 8 bits for red channel. PTB-INFO: System Frame buffer provides 8 bits for green channel. PTB-INFO: System Frame buffer provides 8 bits for blue channel. PTB-INFO: System frame buffer provides 8 bits for alpha channel, but effective alpha bits depends on imaging pipeline setup, if any. OpenGL-Vendor / renderer / version are: [X.Org](http://X.Org) - Radeon Pro WX 9100 (VEGA10, DRM 3.35.0, 5.4.0-70-lowlatency, LLVM 11.0.0) - 4.6 (Compatibility Profile) Mesa 20.2.6 OpenGL-Extensions are: GL\_ARB\_multisample GL\_EXT\_abgr GL\_EXT\_bgra GL\_EXT\_blend\_color GL\_EXT\_blend\_minmax GL\_EXT\_blend\_subtract GL\_EXT\_copy\_texture GL\_EXT\_subtexture GL\_EXT\_texture\_object GL\_EXT\_vertex\_array GL\_EXT\_compiled\_vertex\_array GL\_EXT\_texture GL\_EXT\_texture3D GL\_IBM\_rasterpos\_clip GL\_ARB\_point\_parameters GL\_EXT\_draw\_range\_elements GL\_EXT\_packed\_pixels GL\_EXT\_point\_parameters GL\_EXT\_rescale\_normal GL\_EXT\_separate\_specular\_color GL\_EXT\_texture\_edge\_clamp GL\_SGIS\_generate\_mipmap GL\_SGIS\_texture\_border\_clamp GL\_SGIS\_texture\_edge\_clamp GL\_SGIS\_texture\_lod GL\_ARB\_framebuffer\_sRGB GL\_ARB\_multitexture GL\_EXT\_framebuffer\_sRGB GL\_IBM\_multimode\_draw\_arrays GL\_IBM\_texture\_mirrored\_repeat GL\_ARB\_texture\_cube\_map GL\_ARB\_texture\_env\_add GL\_ARB\_transpose\_matrix GL\_EXT\_blend\_func\_separate GL\_EXT\_fog\_coord GL\_EXT\_multi\_draw\_arrays GL\_EXT\_secondary\_color GL\_EXT\_texture\_env\_add GL\_EXT\_texture\_filter\_anisotropic GL\_EXT\_texture\_lod\_bias GL\_INGR\_blend\_func\_separate GL\_NV\_blend\_square GL\_NV\_light\_max\_exponent GL\_NV\_texgen\_reflection GL\_NV\_texture\_env\_combine4 GL\_S3\_s3tc GL\_SUN\_multi\_draw\_arrays GL\_ARB\_texture\_border\_clamp GL\_ARB\_texture\_compression GL\_EXT\_framebuffer\_object GL\_EXT\_texture\_compression\_s3tc GL\_EXT\_texture\_env\_combine GL\_EXT\_texture\_env\_dot3 GL\_MESA\_window\_pos GL\_NV\_packed\_depth\_stencil GL\_NV\_texture\_rectangle GL\_ARB\_depth\_texture GL\_ARB\_occlusion\_query GL\_ARB\_shadow GL\_ARB\_texture\_env\_combine GL\_ARB\_texture\_env\_crossbar GL\_ARB\_texture\_env\_dot3 GL\_ARB\_texture\_mirrored\_repeat GL\_ARB\_window\_pos GL\_ATI\_fragment\_shader GL\_EXT\_stencil\_two\_side GL\_EXT\_texture\_cube\_map GL\_NV\_depth\_clamp GL\_NV\_fog\_distance GL\_APPLE\_packed\_pixels GL\_ARB\_draw\_buffers GL\_ARB\_fragment\_program GL\_ARB\_fragment\_shader GL\_ARB\_shader\_objects GL\_ARB\_vertex\_program GL\_ARB\_vertex\_shader GL\_ATI\_draw\_buffers GL\_ATI\_texture\_env\_combine3 GL\_ATI\_texture\_float GL\_EXT\_depth\_bounds\_test GL\_EXT\_shadow\_funcs GL\_EXT\_stencil\_wrap GL\_MESA\_pack\_invert GL\_NV\_primitive\_restart GL\_ARB\_depth\_clamp GL\_ARB\_fragment\_program\_shadow GL\_ARB\_half\_float\_pixel GL\_ARB\_occlusion\_query2 GL\_ARB\_point\_sprite GL\_ARB\_shading\_language\_100 GL\_ARB\_sync GL\_ARB\_texture\_non\_power\_of\_two GL\_ARB\_vertex\_buffer\_object GL\_ATI\_blend\_equation\_separate GL\_EXT\_blend\_equation\_separate GL\_OES\_read\_format GL\_ARB\_color\_buffer\_float GL\_ARB\_pixel\_buffer\_object GL\_ARB\_texture\_compression\_rgtc GL\_ARB\_texture\_float GL\_ARB\_texture\_rectangle GL\_ATI\_texture\_compression\_3dc GL\_EXT\_packed\_float GL\_EXT\_pixel\_buffer\_object GL\_EXT\_texture\_compression\_dxt1 GL\_EXT\_texture\_compression\_rgtc GL\_EXT\_texture\_mirror\_clamp GL\_EXT\_texture\_rectangle GL\_EXT\_texture\_sRGB GL\_EXT\_texture\_shared\_exponent GL\_ARB\_framebuffer\_object GL\_EXT\_framebuffer\_blit GL\_EXT\_framebuffer\_multisample GL\_EXT\_packed\_depth\_stencil GL\_ARB\_vertex\_array\_object GL\_ATI\_separate\_stencil GL\_ATI\_texture\_mirror\_once GL\_EXT\_draw\_buffers2 GL\_EXT\_draw\_instanced GL\_EXT\_gpu\_program\_parameters GL\_EXT\_gpu\_shader4 GL\_EXT\_texture\_array GL\_EXT\_texture\_compression\_latc GL\_EXT\_texture\_integer GL\_EXT\_texture\_sRGB\_decode GL\_EXT\_timer\_query GL\_OES\_EGL\_image GL\_AMD\_performance\_monitor GL\_EXT\_texture\_buffer\_object GL\_AMD\_texture\_texture4 GL\_ARB\_copy\_buffer GL\_ARB\_depth\_buffer\_float GL\_ARB\_draw\_instanced GL\_ARB\_half\_float\_vertex GL\_ARB\_instanced\_arrays GL\_ARB\_map\_buffer\_range GL\_ARB\_texture\_buffer\_object GL\_ARB\_texture\_rg GL\_ARB\_texture\_swizzle GL\_ARB\_vertex\_array\_bgra GL\_EXT\_texture\_swizzle GL\_EXT\_vertex\_array\_bgra GL\_NV\_conditional\_render GL\_AMD\_conservative\_depth GL\_AMD\_depth\_clamp\_separate GL\_AMD\_draw\_buffers\_blend GL\_AMD\_seamless\_cubemap\_per\_texture GL\_AMD\_shader\_stencil\_export GL\_ARB\_ES2\_compatibility GL\_ARB\_blend\_func\_extended GL\_ARB\_compatibility GL\_ARB\_debug\_output GL\_ARB\_draw\_buffers\_blend GL\_ARB\_draw\_elements\_base\_vertex GL\_ARB\_explicit\_attrib\_location GL\_ARB\_fragment\_coord\_conventions GL\_ARB\_provoking\_vertex GL\_ARB\_sample\_shading GL\_ARB\_sampler\_objects GL\_ARB\_seamless\_cube\_map GL\_ARB\_shader\_stencil\_export GL\_ARB\_shader\_texture\_lod GL\_ARB\_tessellation\_shader GL\_ARB\_texture\_buffer\_object\_rgb32 GL\_ARB\_texture\_cube\_map\_array GL\_ARB\_texture\_gather GL\_ARB\_texture\_multisample GL\_ARB\_texture\_query\_lod GL\_ARB\_texture\_rgb10\_a2ui GL\_ARB\_uniform\_buffer\_object GL\_ARB\_vertex\_type\_2\_10\_10\_10\_rev GL\_ATI\_meminfo GL\_EXT\_provoking\_vertex GL\_EXT\_texture\_snorm GL\_MESA\_texture\_signed\_rgba GL\_NV\_copy\_image GL\_NV\_texture\_barrier GL\_ARB\_draw\_indirect GL\_ARB\_get\_program\_binary GL\_ARB\_gpu\_shader5 GL\_ARB\_gpu\_shader\_fp64 GL\_ARB\_robustness GL\_ARB\_separate\_shader\_objects GL\_ARB\_shader\_bit\_encoding GL\_ARB\_shader\_precision GL\_ARB\_shader\_subroutine GL\_ARB\_texture\_compression\_bptc GL\_ARB\_timer\_query GL\_ARB\_transform\_feedback2 GL\_ARB\_transform\_feedback3 GL\_ARB\_vertex\_attrib\_64bit GL\_ARB\_viewport\_array GL\_EXT\_direct\_state\_access GL\_EXT\_shader\_image\_load\_store GL\_EXT\_vertex\_attrib\_64bit GL\_NV\_vdpau\_interop GL\_AMD\_multi\_draw\_indirect GL\_ANGLE\_texture\_compression\_dxt3 GL\_ANGLE\_texture\_compression\_dxt5 GL\_ARB\_base\_instance GL\_ARB\_compressed\_texture\_pixel\_storage GL\_ARB\_conservative\_depth GL\_ARB\_internalformat\_query GL\_ARB\_map\_buffer\_alignment GL\_ARB\_shader\_atomic\_counters GL\_ARB\_shader\_image\_load\_store GL\_ARB\_shading\_language\_420pack GL\_ARB\_shading\_language\_packing GL\_ARB\_texture\_storage GL\_ARB\_transform\_feedback\_instanced GL\_EXT\_framebuffer\_multisample\_blit\_scaled GL\_EXT\_transform\_feedback GL\_AMD\_query\_buffer\_object GL\_AMD\_shader\_trinary\_minmax GL\_AMD\_vertex\_shader\_layer GL\_AMD\_vertex\_shader\_viewport\_index GL\_ARB\_ES3\_compatibility GL\_ARB\_arrays\_of\_arrays GL\_ARB\_clear\_buffer\_object GL\_ARB\_compute\_shader GL\_ARB\_copy\_image GL\_ARB\_explicit\_uniform\_location GL\_ARB\_fragment\_layer\_viewport GL\_ARB\_framebuffer\_no\_attachments GL\_ARB\_invalidate\_subdata GL\_ARB\_multi\_draw\_indirect GL\_ARB\_program\_interface\_query GL\_ARB\_robust\_buffer\_access\_behavior GL\_ARB\_shader\_image\_size GL\_ARB\_shader\_storage\_buffer\_object GL\_ARB\_stencil\_texturing GL\_ARB\_texture\_buffer\_range GL\_ARB\_texture\_query\_levels GL\_ARB\_texture\_storage\_multisample GL\_ARB\_texture\_view GL\_ARB\_vertex\_attrib\_binding GL\_KHR\_debug GL\_KHR\_robustness GL\_KHR\_texture\_compression\_astc\_ldr GL\_AMD\_pinned\_memory GL\_ARB\_bindless\_texture GL\_ARB\_buffer\_storage GL\_ARB\_clear\_texture GL\_ARB\_compute\_variable\_group\_size GL\_ARB\_enhanced\_layouts GL\_ARB\_indirect\_parameters GL\_ARB\_internalformat\_query2 GL\_ARB\_multi\_bind GL\_ARB\_query\_buffer\_object GL\_ARB\_seamless\_cubemap\_per\_texture GL\_ARB\_shader\_draw\_parameters GL\_ARB\_shader\_group\_vote GL\_ARB\_shading\_language\_include GL\_ARB\_texture\_mirror\_clamp\_to\_edge GL\_ARB\_texture\_stencil8 GL\_ARB\_vertex\_type\_10f\_11f\_11f\_rev GL\_EXT\_shader\_integer\_mix GL\_NVX\_gpu\_memory\_info GL\_ARB\_ES3\_1\_compatibility GL\_ARB\_clip\_control GL\_ARB\_conditional\_render\_inverted GL\_ARB\_cull\_distance GL\_ARB\_derivative\_control GL\_ARB\_direct\_state\_access GL\_ARB\_get\_texture\_sub\_image GL\_ARB\_pipeline\_statistics\_query GL\_ARB\_shader\_texture\_image\_samples GL\_ARB\_sparse\_buffer GL\_ARB\_texture\_barrier GL\_ARB\_transform\_feedback\_overflow\_query GL\_EXT\_polygon\_offset\_clamp GL\_EXT\_shader\_image\_load\_formatted GL\_KHR\_blend\_equation\_advanced GL\_KHR\_context\_flush\_control GL\_KHR\_robust\_buffer\_access\_behavior GL\_ARB\_gpu\_shader\_int64 GL\_ARB\_parallel\_shader\_compile GL\_ARB\_shader\_atomic\_counter\_ops GL\_ARB\_shader\_ballot GL\_ARB\_shader\_clock GL\_ARB\_shader\_viewport\_layer\_array GL\_EXT\_shader\_samples\_identical GL\_KHR\_no\_error GL\_KHR\_texture\_compression\_astc\_sliced\_3d GL\_ARB\_gl\_spirv GL\_ARB\_spirv\_extensions GL\_EXT\_window\_rectangles GL\_MESA\_shader\_integer\_functions GL\_ARB\_polygon\_offset\_clamp GL\_ARB\_texture\_filter\_anisotropic GL\_EXT\_memory\_object GL\_EXT\_memory\_object\_fd GL\_EXT\_semaphore GL\_EXT\_semaphore\_fd GL\_KHR\_parallel\_shader\_compile GL\_NV\_alpha\_to\_coverage\_dither\_control GL\_AMD\_framebuffer\_multisample\_advanced GL\_EXT\_EGL\_image\_storage GL\_EXT\_texture\_sRGB\_R8 GL\_EXT\_texture\_shadow\_lod GL\_MESA\_framebuffer\_flip\_y GL\_EXT\_EGL\_sync PTB-Info: Running on ‘The [X.Org](http://X.Org) Foundation’ XServer, Vendor release 12009000. RandR: 1920x1080\_120.00 (0x9d) 368.8MHz h: width 1920 start 2072 end 2288 total 2656 skew 0 v: height 1080 start 1081 end 1084 total 1157 RandR: 1920x1080\_120.00 (0x9d) 368.8MHz h: width 1920 start 2072 end 2288 total 2656 skew 0 v: height 1080 start 1081 end 1084 total 1157 PTB-INFO: Threshold Settings for successfull video refresh calibration are: maxStdDev = 0.200000 msecs, maxDeviation = 10.000000 %, minSamples = 50, maxDuration = 5.000000 secs. PTB-WARNING: Querying rasterbeam-position doesn’t work on your setup! (Returns a constant value 0) PTB-WARNING: This can happen if Psychtoolbox gets the mapping of connected displays to graphics card PTB-WARNING: outputs wrong. See ‘help DisplayOutputMappings’ for tips on how to resolve this problem. PTB-WARNING: However, this probably doesn’t really matter on your setup for most purposes, as i can use OpenML PTB-WARNING: timestamping instead, which is even more precise. Only few applications need beampos queries in this case. PTB-DEBUG: Output of all acquired samples of calibration run follows: PTB-DEBUG: Sample 0: 0.000000 PTB-DEBUG: Sample 1: 0.008334 PTB-DEBUG: Sample 2: 0.008333 PTB-DEBUG: Sample 3: 0.008334 PTB-DEBUG: Sample 4: 0.008332 PTB-DEBUG: Sample 5: 0.008334 PTB-DEBUG: Sample 6: 0.008334 PTB-DEBUG: Sample 7: 0.008333 PTB-DEBUG: Sample 8: 0.008334 PTB-DEBUG: Sample 9: 0.008333 PTB-DEBUG: Sample 10: 0.008333 PTB-DEBUG: Sample 11: 0.008334 PTB-DEBUG: Sample 12: 0.008333 PTB-DEBUG: Sample 13: 0.008333 PTB-DEBUG: Sample 14: 0.008334 PTB-DEBUG: Sample 15: 0.008333 PTB-DEBUG: Sample 16: 0.008334 PTB-DEBUG: Sample 17: 0.008333 PTB-DEBUG: Sample 18: 0.008334 PTB-DEBUG: Sample 19: 0.008334 PTB-DEBUG: Sample 20: 0.008333 PTB-DEBUG: Sample 21: 0.008334 PTB-DEBUG: Sample 22: 0.008333 PTB-DEBUG: Sample 23: 0.008334 PTB-DEBUG: Sample 24: 0.008333 PTB-DEBUG: Sample 25: 0.008334 PTB-DEBUG: Sample 26: 0.008333 PTB-DEBUG: Sample 27: 0.008334 PTB-DEBUG: Sample 28: 0.008334 PTB-DEBUG: Sample 29: 0.008333 PTB-DEBUG: Sample 30: 0.008333 PTB-DEBUG: Sample 31: 0.008334 PTB-DEBUG: Sample 32: 0.008334 PTB-DEBUG: Sample 33: 0.008333 PTB-DEBUG: Sample 34: 0.008333 PTB-DEBUG: Sample 35: 0.008333 PTB-DEBUG: Sample 36: 0.008334 PTB-DEBUG: Sample 37: 0.008333 PTB-DEBUG: Sample 38: 0.008334 PTB-DEBUG: Sample 39: 0.008333 PTB-DEBUG: Sample 40: 0.008334 PTB-DEBUG: Sample 41: 0.008333 PTB-DEBUG: Sample 42: 0.008334 PTB-DEBUG: Sample 43: 0.008333 PTB-DEBUG: Sample 44: 0.008334 PTB-DEBUG: Sample 45: 0.008333 PTB-DEBUG: Sample 46: 0.008333 PTB-DEBUG: Sample 47: 0.008334 PTB-DEBUG: Sample 48: 0.008333 PTB-DEBUG: Sample 49: 0.008334 PTB-DEBUG: Sample 50: 0.008333 PTB-DEBUG: End of calibration data for this run… ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:03pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/22 "2021-03-30T13:03:36Z")
PTB-INFO: OpenGL-Renderer is [X.Org](http://X.Org) :: Radeon Pro WX 9100 (VEGA10, DRM 3.35.0, 5.4.0-70-lowlatency, LLVM 11.0.0) :: 4.6 (Compatibility Profile) Mesa 20.2.6 PTB-INFO: VBL startline = 1080 , VBL Endline = -1 PTB-INFO: Will try to use OS-Builtin OpenML sync control support for accurate Flip timestamping. PTB-INFO: Measured monitor refresh interval from VBLsync = 8.333535 ms [119.997093 Hz]. (50 valid samples taken, stddev=0.000562 ms.) PTB-INFO: Reported monitor refresh interval from operating system = 8.333333 ms [120.000000 Hz]. PTB-INFO: Small deviations between reported values are normal and no reason to worry. PTB-INFO: Using OpenGL GL\_TEXTURE\_RECTANGLE\_EXT extension for efficient high-performance texture mapping… PTB-INFO: Support for fast OffscreenWindows enabled. PTB-INFO: SetDitherMode: Trying to disable digital display dithering on display head 1. PTB-INFO: SetDitherMode: Dithering already disabled. Skipped. PsychOSKDGetLUTState(): Checking LUT and bias values on GPU for headId 1. PsychOSKDGetLUTState(): headId 1 [Offset 0x5ab4] uses old modesetting with REGAMMA\_LUT [0]. PsychOSKDOffsets: Black 0 : White 65535. 0:0,0,0 1:0,0,0 2:0,0,0 3:0,0,0 4:0,0,0 5:0,0,0 6:0,0,0 7:0,0,0 8:0,0,0 9:0,0,0 10:0,0,0 11:0,0,0 12:0,0,0 13:0,0,0 14:0,0,0 15:0,0,0 16:0,0,0 17:0,0,0 18:0,0,0 19:0,0,0 20:0,0,0 21:0,0,0 22:0,0,0 23:0,0,0 24:0,0,0 25:0,0,0 26:0,0,0 27:0,0,0 28:0,0,0 29:0,0,0 30:0,0,0 31:0,0,0 32:0,0,0 33:0,0,0 34:0,0,0 35:0,0,0 36:0,0,0 37:0,0,0 38:0,0,0 39:0,0,0 40:0,0,0 41:0,0,0 42:0,0,0 43:0,0,0 44:0,0,0 45:0,0,0 46:0,0,0 47:0,0,0 48:0,0,0 49:0,0,0 50:0,0,0 51:0,0,0 52:0,0,0 53:0,0,0 54:0,0,0 55:0,0,0 56:0,0,0 57:0,0,0 58:0,0,0 59:0,0,0 60:0,0,0 61:0,0,0 62:0,0,0 63:0,0,0 64:0,0,0 65:0,0,0 66:0,0,0 67:0,0,0 68:0,0,0 69:0,0,0 70:0,0,0 71:0,0,0 72:0,0,0 73:0,0,0 74:0,0,0 75:0,0,0 76:0,0,0 77:0,0,0 78:0,0,0 79:0,0,0 80:0,0,0 81:0,0,0 82:0,0,0 83:0,0,0 84:0,0,0 85:0,0,0 86:0,0,0 87:0,0,0 88:0,0,0 89:0,0,0 90:0,0,0 91:0,0,0 92:0,0,0 93:0,0,0 94:0,0,0 95:0,0,0 96:0,0,0 97:0,0,0 98:0,0,0 99:0,0,0 100:0,0,0 101:0,0,0 102:0,0,0 103:0,0,0 104:0,0,0 105:0,0,0 106:0,0,0 107:0,0,0 108:0,0,0 109:0,0,0 110:0,0,0 111:0,0,0 112:0,0,0 113:0,0,0 114:0,0,0 115:0,0,0 116:0,0,0 117:0,0,0 118:0,0,0 119:0,0,0 120:0,0,0 121:0,0,0 122:0,0,0 123:0,0,0 124:0,0,0 125:0,0,0 126:0,0,0 127:0,0,0 128:0,0,0 129:0,0,0 130:0,0,0 131:0,0,0 132:0,0,0 133:0,0,0 134:0,0,0 135:0,0,0 136:0,0,0 137:0,0,0 138:0,0,0 139:0,0,0 140:0,0,0 141:0,0,0 142:0,0,0 143:0,0,0 144:0,0,0 145:0,0,0 146:0,0,0 147:0,0,0 148:0,0,0 149:0,0,0 150:0,0,0 151:0,0,0 152:0,0,0 153:0,0,0 154:0,0,0 155:0,0,0 156:0,0,0 157:0,0,0 158:0,0,0 159:0,0,0 160:0,0,0 161:0,0,0 162:0,0,0 163:0,0,0 164:0,0,0 165:0,0,0 166:0,0,0 167:0,0,0 168:0,0,0 169:0,0,0 170:0,0,0 171:0,0,0 172:0,0,0 173:0,0,0 174:0,0,0 175:0,0,0 176:0,0,0 177:0,0,0 178:0,0,0 179:0,0,0 180:0,0,0 181:0,0,0 182:0,0,0 183:0,0,0 184:0,0,0 185:0,0,0 186:0,0,0 187:0,0,0 188:0,0,0 189:0,0,0 190:0,0,0 191:0,0,0 192:0,0,0 193:0,0,0 194:0,0,0 195:0,0,0 196:0,0,0 197:0,0,0 198:0,0,0 199:0,0,0 200:0,0,0 201:0,0,0 202:0,0,0 203:0,0,0 204:0,0,0 205:0,0,0 206:0,0,0 207:0,0,0 208:0,0,0 209:0,0,0 210:0,0,0 211:0,0,0 212:0,0,0 213:0,0,0 214:0,0,0 215:0,0,0 216:0,0,0 217:0,0,0 218:0,0,0 219:0,0,0 220:0,0,0 221:0,0,0 222:0,0,0 223:0,0,0 224:0,0,0 225:0,0,0 226:0,0,0 227:0,0,0 228:0,0,0 229:0,0,0 230:0,0,0 231:0,0,0 232:0,0,0 233:0,0,0 234:0,0,0 235:0,0,0 236:0,0,0 237:0,0,0 238:0,0,0 239:0,0,0 240:0,0,0 241:0,0,0 242:0,0,0 243:0,0,0 244:0,0,0 245:0,0,0 246:0,0,0 247:0,0,0 248:0,0,0 249:0,0,0 250:0,0,0 251:0,0,0 252:0,0,0 253:0,0,0 254:0,0,0 255:0,0,0 PTB-INFO: [screen 1, head 1] 1st LUT query rc = 1. PsychOSKDLoadIdentityLUT(): Uploading identity LUT and bias values into GPU for headId 1. PsychOSKDGetLUTState(): Checking LUT and bias values on GPU for headId 1. PsychOSKDGetLUTState(): headId 1 [Offset 0x5ab4] uses old modesetting with REGAMMA\_LUT [0]. PsychOSKDOffsets: Black 0 : White 65535. 0:0,0,0 1:0,0,0 2:0,0,0 3:0,0,0 4:0,0,0 5:0,0,0 6:0,0,0 7:0,0,0 8:0,0,0 9:0,0,0 10:0,0,0 11:0,0,0 12:0,0,0 13:0,0,0 14:0,0,0 15:0,0,0 16:0,0,0 17:0,0,0 18:0,0,0 19:0,0,0 20:0,0,0 21:0,0,0 22:0,0,0 23:0,0,0 24:0,0,0 25:0,0,0 26:0,0,0 27:0,0,0 28:0,0,0 29:0,0,0 30:0,0,0 31:0,0,0 32:0,0,0 33:0,0,0 34:0,0,0 35:0,0,0 36:0,0,0 37:0,0,0 38:0,0,0 39:0,0,0 40:0,0,0 41:0,0,0 42:0,0,0 43:0,0,0 44:0,0,0 45:0,0,0 46:0,0,0 47:0,0,0 48:0,0,0 49:0,0,0 50:0,0,0 51:0,0,0 52:0,0,0 53:0,0,0 54:0,0,0 55:0,0,0 56:0,0,0 57:0,0,0 58:0,0,0 59:0,0,0 60:0,0,0 61:0,0,0 62:0,0,0 63:0,0,0 64:0,0,0 65:0,0,0 66:0,0,0 67:0,0,0 68:0,0,0 69:0,0,0 70:0,0,0 71:0,0,0 72:0,0,0 73:0,0,0 74:0,0,0 75:0,0,0 76:0,0,0 77:0,0,0 78:0,0,0 79:0,0,0 80:0,0,0 81:0,0,0 82:0,0,0 83:0,0,0 84:0,0,0 85:0,0,0 86:0,0,0 87:0,0,0 88:0,0,0 89:0,0,0 90:0,0,0 91:0,0,0 92:0,0,0 93:0,0,0 94:0,0,0 95:0,0,0 96:0,0,0 97:0,0,0 98:0,0,0 99:0,0,0 100:0,0,0 101:0,0,0 102:0,0,0 103:0,0,0 104:0,0,0 105:0,0,0 106:0,0,0 107:0,0,0 108:0,0,0 109:0,0,0 110:0,0,0 111:0,0,0 112:0,0,0 113:0,0,0 114:0,0,0 115:0,0,0 116:0,0,0 117:0,0,0 118:0,0,0 119:0,0,0 120:0,0,0 121:0,0,0 122:0,0,0 123:0,0,0 124:0,0,0 125:0,0,0 126:0,0,0 127:0,0,0 128:0,0,0 129:0,0,0 130:0,0,0 131:0,0,0 132:0,0,0 133:0,0,0 134:0,0,0 135:0,0,0 136:0,0,0 137:0,0,0 138:0,0,0 139:0,0,0 140:0,0,0 141:0,0,0 142:0,0,0 143:0,0,0 144:0,0,0 145:0,0,0 146:0,0,0 147:0,0,0 148:0,0,0 149:0,0,0 150:0,0,0 151:0,0,0 152:0,0,0 153:0,0,0 154:0,0,0 155:0,0,0 156:0,0,0 157:0,0,0 158:0,0,0 159:0,0,0 160:0,0,0 161:0,0,0 162:0,0,0 163:0,0,0 164:0,0,0 165:0,0,0 166:0,0,0 167:0,0,0 168:0,0,0 169:0,0,0 170:0,0,0 171:0,0,0 172:0,0,0 173:0,0,0 174:0,0,0 175:0,0,0 176:0,0,0 177:0,0,0 178:0,0,0 179:0,0,0 180:0,0,0 181:0,0,0 182:0,0,0 183:0,0,0 184:0,0,0 185:0,0,0 186:0,0,0 187:0,0,0 188:0,0,0 189:0,0,0 190:0,0,0 191:0,0,0 192:0,0,0 193:0,0,0 194:0,0,0 195:0,0,0 196:0,0,0 197:0,0,0 198:0,0,0 199:0,0,0 200:0,0,0 201:0,0,0 202:0,0,0 203:0,0,0 204:0,0,0 205:0,0,0 206:0,0,0 207:0,0,0 208:0,0,0 209:0,0,0 210:0,0,0 211:0,0,0 212:0,0,0 213:0,0,0 214:0,0,0 215:0,0,0 216:0,0,0 217:0,0,0 218:0,0,0 219:0,0,0 220:0,0,0 221:0,0,0 222:0,0,0 223:0,0,0 224:0,0,0 225:0,0,0 226:0,0,0 227:0,0,0 228:0,0,0 229:0,0,0 230:0,0,0 231:0,0,0 232:0,0,0 233:0,0,0 234:0,0,0 235:0,0,0 236:0,0,0 237:0,0,0 238:0,0,0 239:0,0,0 240:0,0,0 241:0,0,0 242:0,0,0 243:0,0,0 244:0,0,0 245:0,0,0 246:0,0,0 247:0,0,0 248:0,0,0 249:0,0,0 250:0,0,0 251:0,0,0 252:0,0,0 253:0,0,0 254:0,0,0 255:0,0,0 PTB-INFO: [screen 1, head 1] 2nd LUT query rc = 1. PTB-INFO: GPU framebuffer passthrough setup II completed on screenid 1, head 1. Failed to establish identity passthrough! PTB-INFO: Could not upload a perfect identity LUT. May still work due to hopefully disabled dithering, who knows? LoadIdentityClut: Warning: GPU low-level setup code for pixel passthrough failed for some reason! Using fallback… ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:04pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/23 "2021-03-30T13:04:19Z")
Ref 0: RGB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Ref 1: RGB 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 → TROUBLE! WRONG VALUE Ref 2: RGB 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 → TROUBLE! WRONG VALUE Ref 3: RGB 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 → TROUBLE! WRONG VALUE Ref 4: RGB 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 → TROUBLE! WRONG VALUE Ref 5: RGB 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 → TROUBLE! WRONG VALUE Ref 6: RGB 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 → TROUBLE! WRONG VALUE Ref 7: RGB 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 → TROUBLE! WRONG VALUE Ref 8: RGB 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 → TROUBLE! WRONG VALUE Ref 9: RGB 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 → TROUBLE! WRONG VALUE Ref 10: RGB 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 → TROUBLE! WRONG VALUE Ref 11: RGB 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 → TROUBLE! WRONG VALUE Ref 12: RGB 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 → TROUBLE! WRONG VALUE Ref 13: RGB 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 → TROUBLE! WRONG VALUE Ref 14: RGB 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 → TROUBLE! WRONG VALUE Ref 15: RGB 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 → TROUBLE! WRONG VALUE Ref 16: RGB 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 → TROUBLE! WRONG VALUE Ref 17: RGB 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 → TROUBLE! WRONG VALUE Ref 18: RGB 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 → TROUBLE! WRONG VALUE Ref 19: RGB 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 → TROUBLE! WRONG VALUE Ref 20: RGB 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 → TROUBLE! WRONG VALUE Ref 21: RGB 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 → TROUBLE! WRONG VALUE Ref 22: RGB 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 → TROUBLE! WRONG VALUE Ref 23: RGB 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 → TROUBLE! WRONG VALUE Ref 24: RGB 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 → TROUBLE! WRONG VALUE Ref 25: RGB 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 → TROUBLE! WRONG VALUE Ref 26: RGB 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 → TROUBLE! WRONG VALUE Ref 27: RGB 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 → TROUBLE! WRONG VALUE Ref 28: RGB 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 → TROUBLE! WRONG VALUE Ref 29: RGB 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 → TROUBLE! WRONG VALUE Ref 30: RGB 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 → TROUBLE! WRONG VALUE Ref 31: RGB 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 → TROUBLE! WRONG VALUE Ref 32: RGB 33 33 33 33 33 33 33 33 33 33 33 33 33 32 32 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 32 33 33 32 33 33 33 33 33 33 33 33 33 33 33 33 → TROUBLE! WRONG VALUE Ref 33: RGB 34 34 34 34 34 34 34 34 34 34 34 34 34 33 33 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 33 34 34 33 34 34 34 34 34 34 34 34 34 34 34 34 → TROUBLE! WRONG VALUE Ref 34: RGB 35 35 35 35 35 35 35 35 35 35 35 35 35 34 34 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 34 35 35 34 35 35 35 35 35 35 35 35 35 35 35 35 → TROUBLE! WRONG VALUE Ref 35: RGB 36 36 36 36 36 36 36 36 36 36 36 36 36 35 35 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 35 36 36 35 36 36 36 36 36 36 36 36 36 36 36 36 → TROUBLE! WRONG VALUE Ref 36: RGB 37 37 37 37 37 37 37 37 37 37 37 37 37 36 36 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 36 37 37 36 37 37 37 37 37 37 37 37 37 37 37 37 → TROUBLE! WRONG VALUE Ref 37: RGB 38 38 38 38 38 38 38 38 38 38 38 38 38 37 37 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 37 38 38 37 38 38 38 38 38 38 38 38 38 38 38 38 → TROUBLE! WRONG VALUE Ref 38: RGB 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 38 39 39 38 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 38 → TROUBLE! WRONG VALUE Ref 39: RGB 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 39 40 40 39 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 39 → TROUBLE! WRONG VALUE Ref 40: RGB 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 40 41 41 40 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 40 → TROUBLE! WRONG VALUE Ref 41: RGB 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 41 42 42 41 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 41 → TROUBLE! WRONG VALUE Ref 42: RGB 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 42 43 43 42 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 42 → TROUBLE! WRONG VALUE Ref 43: RGB 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 43 44 44 43 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 43 → TROUBLE! WRONG VALUE Ref 44: RGB 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 44 45 45 44 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 44 → TROUBLE! WRONG VALUE Ref 45: RGB 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 45 46 46 45 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 45 → TROUBLE! WRONG VALUE Ref 46: RGB 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 46 47 47 46 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 46 → TROUBLE! WRONG VALUE Ref 47: RGB 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 47 48 48 47 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 47 → TROUBLE! WRONG VALUE Ref 48: RGB 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 48 49 49 48 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 48 → TROUBLE! WRONG VALUE Ref 49: RGB 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 49 50 50 49 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 49 → TROUBLE! WRONG VALUE Ref 50: RGB 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 50 51 51 50 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 50 → TROUBLE! WRONG VALUE Ref 51: RGB 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 51 52 52 51 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 51 → TROUBLE! WRONG VALUE Ref 52: RGB 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 52 53 53 52 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 52 → TROUBLE! WRONG VALUE Ref 53: RGB 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 53 54 54 53 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 53 → TROUBLE! WRONG VALUE Ref 54: RGB 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 54 55 55 54 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 54 → TROUBLE! WRONG VALUE Ref 55: RGB 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 55 56 56 55 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 55 → TROUBLE! WRONG VALUE Ref 56: RGB 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 56 57 57 56 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 56 → TROUBLE! WRONG VALUE Ref 57: RGB 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 57 58 58 57 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 57 → TROUBLE! WRONG VALUE Ref 58: RGB 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 58 59 59 58 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 58 → TROUBLE! WRONG VALUE Ref 59: RGB 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 59 60 60 59 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 59 → TROUBLE! WRONG VALUE Ref 60: RGB 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 60 61 61 60 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 60 → TROUBLE! WRONG VALUE Ref 61: RGB 62 62 62 62 62 62 62 62 62 62 62 62 62 61 61 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 61 62 62 61 62 62 62 62 62 62 62 62 62 62 62 62 → TROUBLE! WRONG VALUE Ref 62: RGB 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 62 63 63 62 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 62 → TROUBLE! WRONG VALUE Ref 63: RGB 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 65 65 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 63 64 64 63 64 64 64 64 64 64 64 64 64 64 64 65 64 64 64 64 64 64 64 64 64 64 63 → TROUBLE! WRONG VALUE Ref 64: RGB 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 66 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 64 66 65 65 65 65 65 65 65 65 65 65 65 → TROUBLE! WRONG VALUE Ref 65: RGB 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 67 67 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 65 66 66 66 66 66 66 66 66 66 66 66 67 66 66 66 66 66 66 66 66 66 66 65 → TROUBLE! WRONG VALUE Ref 66: RGB 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 68 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 66 68 67 67 67 67 67 67 67 67 67 67 67 → TROUBLE! WRONG VALUE Ref 67: RGB 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 69 69 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 67 68 68 68 68 68 68 68 68 68 68 68 69 68 68 68 68 68 68 68 68 68 68 67 → TROUBLE! WRONG VALUE Ref 68: RGB 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 70 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 68 70 69 69 69 69 69 69 69 69 69 69 69 → TROUBLE! WRONG VALUE Ref 69: RGB 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 71 71 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 69 70 70 70 70 70 70 70 70 70 70 70 71 70 70 70 70 70 70 70 70 70 70 69 → TROUBLE! WRONG VALUE Ref 70: RGB 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 72 72 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 70 71 71 71 71 71 71 71 71 71 71 71 72 71 71 71 71 71 71 71 71 71 71 70 → TROUBLE! WRONG VALUE Ref 71: RGB 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 73 73 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 71 72 72 72 72 72 72 72 72 72 72 72 73 72 72 72 72 72 72 72 72 72 72 71 → TROUBLE! WRONG VALUE Ref 72: RGB 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 74 74 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 72 73 73 73 73 73 73 73 73 73 73 73 74 73 73 73 73 73 73 73 73 73 73 72 → TROUBLE! WRONG VALUE Ref 73: RGB 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 75 75 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 73 74 74 74 74 74 74 74 74 74 74 74 75 74 74 74 74 74 74 74 74 74 74 73 → TROUBLE! WRONG VALUE Ref 74: RGB 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 76 76 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 74 75 75 75 75 75 75 75 75 75 75 75 76 75 75 75 75 75 75 75 75 75 75 74 → TROUBLE! WRONG VALUE Ref 75: RGB 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 77 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 75 77 76 76 76 76 76 76 76 76 76 76 76 → TROUBLE! WRONG VALUE Ref 76: RGB 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 76 77 77 77 77 77 77 77 77 77 77 77 78 77 77 77 77 77 77 77 77 77 77 76 → TROUBLE! WRONG VALUE Ref 77: RGB 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 79 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 77 79 78 78 78 78 78 78 78 78 78 78 78 → TROUBLE! WRONG VALUE Ref 78: RGB 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 80 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 78 80 79 79 79 79 79 79 79 79 79 79 79 → TROUBLE! WRONG VALUE Ref 79: RGB 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 81 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 79 81 80 80 80 80 80 80 80 80 80 80 80 → TROUBLE! WRONG VALUE Ref 80: RGB 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 82 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 80 82 81 81 81 81 81 81 81 81 81 81 81 → TROUBLE! WRONG VALUE Ref 81: RGB 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 83 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 81 83 82 82 82 82 82 82 82 82 82 82 82 → TROUBLE! WRONG VALUE Ref 82: RGB 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 84 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 82 84 83 83 83 83 83 83 83 83 83 83 83 → TROUBLE! WRONG VALUE Ref 83: RGB 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 85 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 83 85 84 84 84 84 84 84 84 84 84 84 84 → TROUBLE! WRONG VALUE Ref 84: RGB 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 86 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 84 86 85 85 85 85 85 85 85 85 85 85 85 → TROUBLE! WRONG VALUE Ref 85: RGB 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 87 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 85 87 86 86 86 86 86 86 86 86 86 86 86 → TROUBLE! WRONG VALUE Ref 86: RGB 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 88 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 86 88 87 87 87 87 87 87 87 87 87 87 87 → TROUBLE! WRONG VALUE Ref 87: RGB 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 89 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 87 89 88 88 88 88 88 88 88 88 88 88 88 → TROUBLE! WRONG VALUE Ref 88: RGB 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 90 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 88 90 89 89 89 89 89 89 89 89 89 89 89 → TROUBLE! WRONG VALUE Ref 89: RGB 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 91 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 89 91 90 90 90 90 90 90 90 90 90 90 90 → TROUBLE! WRONG VALUE Ref 90: RGB 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 92 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 90 92 91 91 91 91 91 91 91 91 91 91 91 → TROUBLE! WRONG VALUE Ref 91: RGB 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 93 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 91 93 92 92 92 92 92 92 92 92 92 92 92 → TROUBLE! WRONG VALUE Ref 92: RGB 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 94 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 92 94 93 93 93 93 93 93 93 93 93 93 93 → TROUBLE! WRONG VALUE Ref 93: RGB 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 95 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 93 95 94 94 94 94 94 94 94 94 94 94 94 → TROUBLE! WRONG VALUE Ref 94: RGB 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 96 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 94 96 95 95 95 95 95 95 95 95 95 95 95 → TROUBLE! WRONG VALUE Ref 95: RGB 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 97 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 95 97 96 96 96 96 96 96 96 96 96 96 96 → TROUBLE! WRONG VALUE Ref 96: RGB 97 97 97 97 97 97 97 97 97 97 97 97 96 97 97 97 97 97 97 97 97 96 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 96 97 97 97 97 97 97 97 97 97 97 97 97 → TROUBLE! WRONG VALUE Ref 97: RGB 98 98 98 98 98 98 98 98 98 98 98 98 97 98 98 98 98 98 98 98 98 97 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 97 98 98 98 98 98 98 98 98 98 98 98 98 → TROUBLE! WRONG VALUE Ref 98: RGB 99 99 99 99 99 99 99 99 99 99 99 99 98 99 99 99 99 99 99 99 99 98 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 98 99 99 99 99 99 99 99 99 99 99 99 99 → TROUBLE! WRONG VALUE Ref 99: RGB 100 100 100 100 100 100 100 100 100 100 100 100 99 100 100 100 100 100 100 100 100 99 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 99 100 100 100 100 100 100 100 100 100 100 100 100 → TROUBLE! WRONG VALUE Ref 100: RGB 101 101 101 101 101 101 101 101 101 101 101 101 100 101 101 101 101 101 101 101 101 100 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 100 101 101 101 101 101 101 101 101 101 101 101 101 → TROUBLE! WRONG VALUE Ref 101: RGB 102 102 102 102 102 102 102 102 102 102 102 102 101 102 102 102 102 102 102 102 102 101 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 101 102 102 102 102 102 102 102 102 102 102 102 102 → TROUBLE! WRONG VALUE Ref 102: RGB 103 103 103 103 103 103 103 103 103 103 103 103 102 103 103 103 103 103 103 103 103 102 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 102 103 103 103 103 103 103 103 103 103 103 103 103 → TROUBLE! WRONG VALUE Ref 103: RGB 104 104 104 104 104 104 104 104 104 104 104 104 103 104 104 104 104 104 104 104 104 103 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 103 104 104 104 104 104 104 104 104 104 104 104 104 → TROUBLE! WRONG VALUE Ref 104: RGB 105 105 105 105 105 105 105 105 105 105 105 105 104 105 105 105 105 105 105 105 105 104 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 104 105 105 105 105 105 105 105 105 105 105 105 105 → TROUBLE! WRONG VALUE Ref 105: RGB 106 106 106 106 106 106 106 106 106 106 106 106 105 106 106 106 106 106 106 106 106 105 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 105 106 106 106 106 106 106 106 106 106 106 106 106 → TROUBLE! WRONG VALUE Ref 106: RGB 107 107 107 107 107 107 107 107 107 107 107 107 106 107 107 107 107 107 107 107 107 106 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 106 107 107 107 107 107 107 107 107 107 107 107 107 → TROUBLE! WRONG VALUE Ref 107: RGB 108 108 108 108 108 108 108 108 108 108 108 108 107 108 108 108 108 108 108 108 108 107 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 107 108 108 108 108 108 108 108 108 108 108 108 108 → TROUBLE! WRONG VALUE Ref 108: RGB 109 109 109 109 109 109 109 109 109 109 109 109 108 109 109 109 109 109 109 109 109 108 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 108 109 109 109 109 109 109 109 109 109 109 109 109 → TROUBLE! WRONG VALUE Ref 109: RGB 110 110 110 110 110 110 110 110 110 110 110 110 109 110 110 110 110 110 110 110 110 109 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 109 110 110 110 110 110 110 110 110 110 110 110 110 → TROUBLE! WRONG VALUE Ref 110: RGB 111 111 111 111 111 111 111 111 111 111 111 111 110 111 111 111 111 111 111 111 111 110 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 110 111 111 111 111 111 111 111 111 111 111 111 111 → TROUBLE! WRONG VALUE Ref 111: RGB 112 112 112 112 112 112 112 112 112 112 112 112 111 112 112 112 112 112 112 112 112 111 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 111 112 112 112 112 112 112 112 112 112 112 112 112 → TROUBLE! WRONG VALUE Ref 112: RGB 113 113 113 113 113 113 113 113 113 113 113 113 112 113 113 113 113 113 113 113 113 112 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 112 113 113 113 113 113 113 113 113 113 113 113 113 → TROUBLE! WRONG VALUE Ref 113: RGB 114 114 114 114 114 114 114 114 114 114 114 114 113 114 114 114 114 114 114 114 114 113 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 113 114 114 114 114 114 114 114 114 114 114 114 114 → TROUBLE! WRONG VALUE Ref 114: RGB 115 115 115 115 115 115 115 115 115 115 115 115 114 115 115 115 115 115 115 115 115 114 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 114 115 115 115 115 115 115 115 115 115 115 115 115 → TROUBLE! WRONG VALUE Ref 115: RGB 116 116 116 116 116 116 116 116 116 116 116 116 115 116 116 116 116 116 116 116 116 115 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 115 116 116 116 116 116 116 116 116 116 116 116 116 → TROUBLE! WRONG VALUE Ref 116: RGB 117 117 117 117 117 117 117 117 117 117 117 117 116 117 117 117 117 117 117 117 117 116 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 116 117 117 117 117 117 117 117 117 117 117 117 117 → TROUBLE! WRONG VALUE Ref 117: RGB 118 118 118 118 118 118 118 118 118 118 118 118 117 118 118 118 118 118 118 118 118 117 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 117 118 118 118 118 118 118 118 118 118 118 118 118 → TROUBLE! WRONG VALUE Ref 118: RGB 119 119 119 119 119 119 119 119 119 119 119 119 118 119 119 119 119 119 119 119 119 118 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 118 119 119 119 119 119 119 119 119 119 119 119 119 → TROUBLE! WRONG VALUE Ref 119: RGB 120 120 120 120 120 120 120 120 120 120 120 120 119 120 120 120 120 120 120 120 120 119 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 119 120 120 120 120 120 120 120 120 120 120 120 120 → TROUBLE! WRONG VALUE Ref 120: RGB 121 121 121 121 121 121 121 121 121 121 121 121 120 121 121 121 121 121 121 121 121 120 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 120 121 121 121 121 121 121 121 121 121 121 121 121 → TROUBLE! WRONG VALUE Ref 121: RGB 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 123 123 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 121 122 121 122 122 122 121 122 122 122 122 122 122 122 123 122 122 122 122 122 122 122 122 122 122 121 → TROUBLE! WRONG VALUE Ref 122: RGB 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 124 124 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 122 123 122 123 123 123 122 123 123 123 123 123 123 123 124 123 123 123 123 123 123 123 123 123 123 122 → TROUBLE! WRONG VALUE Ref 123: RGB 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 125 125 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 123 124 123 124 124 124 123 124 124 124 124 124 124 124 125 124 124 124 124 124 124 124 124 124 124 123 → TROUBLE! WRONG VALUE Ref 124: RGB 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 126 126 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 124 125 124 125 125 125 124 125 125 125 125 125 125 125 126 125 125 125 125 125 125 125 125 125 125 124 → TROUBLE! WRONG VALUE Ref 125: RGB 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 127 127 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 125 126 125 126 126 126 125 126 126 126 126 126 126 126 127 126 126 126 126 126 126 126 126 126 126 125 → TROUBLE! WRONG VALUE Ref 126: RGB 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 128 128 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 126 127 126 127 127 127 126 127 127 127 127 127 127 127 128 127 127 127 127 127 127 127 127 127 127 126 → TROUBLE! WRONG VALUE Ref 127: RGB 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 129 129 129 128 128 128 128 128 128 129 128 128 128 128 128 128 128 128 128 127 128 127 128 128 128 127 128 128 128 128 128 128 128 129 128 128 128 128 128 128 128 128 128 128 127 → TROUBLE! WRONG VALUE ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:04pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/24 "2021-03-30T13:04:55Z")
Ref 128: RGB 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 130 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 128 129 128 129 129 129 128 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 128 → TROUBLE! WRONG VALUE Ref 129: RGB 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 131 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 129 130 129 130 130 130 129 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 129 → TROUBLE! WRONG VALUE Ref 130: RGB 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 130 131 131 131 131 131 130 131 131 131 131 131 131 130 131 131 131 131 131 131 131 131 131 131 131 131 → TROUBLE! WRONG VALUE Ref 131: RGB 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 131 132 132 132 132 132 131 132 132 132 132 132 132 131 132 132 132 132 132 132 132 132 132 132 132 132 → TROUBLE! WRONG VALUE Ref 132: RGB 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 132 133 133 133 133 133 132 133 133 133 133 133 133 132 133 133 133 133 133 133 133 133 133 133 133 133 → TROUBLE! WRONG VALUE Ref 133: RGB 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 133 134 134 134 134 134 133 134 134 134 134 134 134 133 134 134 134 134 134 134 134 134 134 134 134 134 → TROUBLE! WRONG VALUE Ref 134: RGB 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 134 135 135 135 135 135 134 135 135 135 135 135 135 134 135 135 135 135 135 135 135 135 135 135 135 135 → TROUBLE! WRONG VALUE Ref 135: RGB 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 135 136 136 136 136 136 135 136 136 136 136 136 136 135 136 136 136 136 136 136 136 136 136 136 136 136 → TROUBLE! WRONG VALUE Ref 136: RGB 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 136 137 137 137 137 137 136 137 137 137 137 137 137 136 137 137 137 137 137 137 137 137 137 137 137 137 → TROUBLE! WRONG VALUE Ref 137: RGB 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 139 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 137 138 137 138 138 138 137 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 137 → TROUBLE! WRONG VALUE Ref 138: RGB 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 140 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 138 139 138 139 139 139 138 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 138 → TROUBLE! WRONG VALUE Ref 139: RGB 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 141 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 139 140 139 140 140 140 139 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 139 → TROUBLE! WRONG VALUE Ref 140: RGB 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 142 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 140 141 140 141 141 141 140 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 140 → TROUBLE! WRONG VALUE Ref 141: RGB 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 143 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 141 142 141 142 142 142 141 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 141 → TROUBLE! WRONG VALUE Ref 142: RGB 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 142 143 143 143 143 143 142 143 143 143 143 143 143 142 143 143 143 143 143 143 143 143 143 143 143 143 → TROUBLE! WRONG VALUE Ref 143: RGB 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 143 144 144 144 144 144 143 144 144 144 144 144 144 143 144 144 144 144 144 144 144 144 144 144 144 144 → TROUBLE! WRONG VALUE Ref 144: RGB 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 144 145 145 145 145 145 144 145 145 145 145 145 145 144 145 145 145 145 145 145 145 145 145 145 145 145 → TROUBLE! WRONG VALUE Ref 145: RGB 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 145 146 146 146 146 146 145 146 146 146 146 146 146 145 146 146 146 146 146 146 146 146 146 146 146 146 → TROUBLE! WRONG VALUE Ref 146: RGB 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 146 147 147 147 147 147 146 147 147 147 147 147 147 146 147 147 147 147 147 147 147 147 147 147 147 147 → TROUBLE! WRONG VALUE Ref 147: RGB 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 147 148 148 148 148 148 147 148 148 148 148 148 148 147 148 148 148 148 148 148 148 148 148 148 148 148 → TROUBLE! WRONG VALUE Ref 148: RGB 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 148 149 149 149 149 149 148 149 149 149 149 149 149 148 149 149 149 149 149 149 149 149 149 149 149 149 → TROUBLE! WRONG VALUE Ref 149: RGB 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 149 150 150 150 150 150 149 150 150 150 150 150 150 149 150 150 150 150 150 150 150 150 150 150 150 150 → TROUBLE! WRONG VALUE Ref 150: RGB 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 150 151 151 151 151 151 150 151 151 151 151 151 151 150 151 151 151 151 151 151 151 151 151 151 151 151 → TROUBLE! WRONG VALUE Ref 151: RGB 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 153 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 151 152 151 152 152 152 151 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 151 → TROUBLE! WRONG VALUE Ref 152: RGB 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 154 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 152 153 152 153 153 153 152 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 152 → TROUBLE! WRONG VALUE Ref 153: RGB 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 155 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 153 154 153 154 154 154 153 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 153 → TROUBLE! WRONG VALUE Ref 154: RGB 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 156 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 154 155 154 155 155 155 154 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 154 → TROUBLE! WRONG VALUE Ref 155: RGB 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 157 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 155 156 155 156 156 156 155 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 155 → TROUBLE! WRONG VALUE Ref 156: RGB 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 158 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 156 157 156 157 157 157 156 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 156 → TROUBLE! WRONG VALUE Ref 157: RGB 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 159 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 157 158 157 158 158 158 157 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 157 → TROUBLE! WRONG VALUE Ref 158: RGB 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 160 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 158 159 158 159 159 159 158 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 158 → TROUBLE! WRONG VALUE Ref 159: RGB 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 161 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 159 160 159 160 160 160 159 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 159 → TROUBLE! WRONG VALUE Ref 160: RGB 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 162 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 160 161 160 161 161 161 160 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 160 → TROUBLE! WRONG VALUE Ref 161: RGB 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 161 162 162 162 162 162 161 162 162 162 162 162 162 161 162 162 162 162 162 162 162 162 162 162 162 162 → TROUBLE! WRONG VALUE Ref 162: RGB 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 162 163 163 163 163 163 162 163 163 163 163 163 163 162 163 163 163 163 163 163 163 163 163 163 163 163 → TROUBLE! WRONG VALUE Ref 163: RGB 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 163 164 164 164 164 164 163 164 164 164 164 164 164 163 164 164 164 164 164 164 164 164 164 164 164 164 → TROUBLE! WRONG VALUE Ref 164: RGB 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 164 165 165 165 165 165 164 165 165 165 165 165 165 164 165 165 165 165 165 165 165 165 165 165 165 165 → TROUBLE! WRONG VALUE Ref 165: RGB 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 165 166 166 166 166 166 165 166 166 166 166 166 166 165 166 166 166 166 166 166 166 166 166 166 166 166 → TROUBLE! WRONG VALUE Ref 166: RGB 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 166 167 167 167 167 167 166 167 167 167 167 167 167 166 167 167 167 167 167 167 167 167 167 167 167 167 → TROUBLE! WRONG VALUE Ref 167: RGB 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 167 168 168 168 168 168 167 168 168 168 168 168 168 167 168 168 168 168 168 168 168 168 168 168 168 168 → TROUBLE! WRONG VALUE Ref 168: RGB 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 168 169 169 169 169 169 168 169 169 169 169 169 169 168 169 169 169 169 169 169 169 169 169 169 169 169 → TROUBLE! WRONG VALUE Ref 169: RGB 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 169 170 170 170 170 170 169 170 170 170 170 170 170 169 170 170 170 170 170 170 170 170 170 170 170 170 → TROUBLE! WRONG VALUE Ref 170: RGB 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 170 171 171 171 171 171 170 171 171 171 171 171 171 170 171 171 171 171 171 171 171 171 171 171 171 171 → TROUBLE! WRONG VALUE Ref 171: RGB 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 171 172 172 172 172 172 171 172 172 172 172 172 172 171 172 172 172 172 172 172 172 172 172 172 172 172 → TROUBLE! WRONG VALUE Ref 172: RGB 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 172 173 173 173 173 173 172 173 173 173 173 173 173 172 173 173 173 173 173 173 173 173 173 173 173 173 → TROUBLE! WRONG VALUE Ref 173: RGB 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 173 174 174 174 174 174 173 174 174 174 174 174 174 173 174 174 174 174 174 174 174 174 174 174 174 174 → TROUBLE! WRONG VALUE Ref 174: RGB 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 174 175 175 175 175 175 174 175 175 175 175 175 175 174 175 175 175 175 175 175 175 175 175 175 175 175 → TROUBLE! WRONG VALUE Ref 175: RGB 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 175 176 176 176 176 176 175 176 176 176 176 176 176 175 176 176 176 176 176 176 176 176 176 176 176 176 → TROUBLE! WRONG VALUE Ref 176: RGB 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 176 177 177 177 177 177 176 177 177 177 177 177 177 176 177 177 177 177 177 177 177 177 177 177 177 177 → TROUBLE! WRONG VALUE Ref 177: RGB 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 177 178 178 178 178 178 177 178 178 178 178 178 178 177 178 178 178 178 178 178 178 178 178 178 178 178 → TROUBLE! WRONG VALUE Ref 178: RGB 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 178 179 179 179 179 179 178 179 179 179 179 179 179 178 179 179 179 179 179 179 179 179 179 179 179 179 → TROUBLE! WRONG VALUE Ref 179: RGB 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 179 180 180 180 180 180 179 180 180 180 180 180 180 179 180 180 180 180 180 180 180 180 180 180 180 180 → TROUBLE! WRONG VALUE Ref 180: RGB 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 180 181 181 181 181 181 180 181 181 181 181 181 181 180 181 181 181 181 181 181 181 181 181 181 181 181 → TROUBLE! WRONG VALUE Ref 181: RGB 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 181 182 182 182 182 182 181 182 182 182 182 182 182 181 182 182 182 182 182 182 182 182 182 182 182 182 → TROUBLE! WRONG VALUE Ref 182: RGB 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 182 183 183 183 183 183 182 183 183 183 183 183 183 182 183 183 183 183 183 183 183 183 183 183 183 183 → TROUBLE! WRONG VALUE Ref 183: RGB 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 183 184 184 184 184 184 183 184 184 184 184 184 184 183 184 184 184 184 184 184 184 184 184 184 184 184 → TROUBLE! WRONG VALUE Ref 184: RGB 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 184 185 185 185 185 185 184 185 185 185 185 185 185 184 185 185 185 185 185 185 185 185 185 185 185 185 → TROUBLE! WRONG VALUE Ref 185: RGB 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 185 186 186 186 186 186 185 186 186 186 186 186 186 185 186 186 186 186 186 186 186 186 186 186 186 186 → TROUBLE! WRONG VALUE Ref 186: RGB 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 186 187 187 187 187 187 186 187 187 187 187 187 187 186 187 187 187 187 187 187 187 187 187 187 187 187 → TROUBLE! WRONG VALUE Ref 187: RGB 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 187 188 188 188 188 188 187 188 188 188 188 188 188 187 188 188 188 188 188 188 188 188 188 188 188 188 → TROUBLE! WRONG VALUE Ref 188: RGB 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 188 189 189 189 189 189 188 189 189 189 189 189 189 188 189 189 189 189 189 189 189 189 189 189 189 189 → TROUBLE! WRONG VALUE Ref 189: RGB 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 189 190 190 190 190 190 189 190 190 190 190 190 190 189 190 190 190 190 190 190 190 190 190 190 190 190 → TROUBLE! WRONG VALUE Ref 190: RGB 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 190 191 191 191 191 191 190 191 191 191 191 191 191 190 191 191 191 191 191 191 191 191 191 191 191 191 → TROUBLE! WRONG VALUE Ref 191: RGB 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 191 192 192 192 192 192 191 192 192 192 192 192 192 191 192 192 192 192 192 192 192 192 192 192 192 192 → TROUBLE! WRONG VALUE Ref 192: RGB 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 192 193 193 193 192 193 193 193 193 193 193 192 193 193 193 193 193 193 193 193 193 193 193 193 → TROUBLE! WRONG VALUE Ref 193: RGB 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 193 194 194 194 193 194 194 194 194 194 194 193 194 194 194 194 194 194 194 194 194 194 194 194 → TROUBLE! WRONG VALUE Ref 194: RGB 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 194 195 195 195 194 195 195 195 195 195 195 194 195 195 195 195 195 195 195 195 195 195 195 195 → TROUBLE! WRONG VALUE Ref 195: RGB 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 195 196 196 196 195 196 196 196 196 196 196 195 196 196 196 196 196 196 196 196 196 196 196 196 → TROUBLE! WRONG VALUE Ref 196: RGB 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 196 197 197 197 196 197 197 197 197 197 197 196 197 197 197 197 197 197 197 197 197 197 197 197 → TROUBLE! WRONG VALUE Ref 197: RGB 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 197 198 198 198 197 198 198 198 198 198 198 197 198 198 198 198 198 198 198 198 198 198 198 198 → TROUBLE! WRONG VALUE Ref 198: RGB 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 198 199 199 199 198 199 199 199 199 199 199 198 199 199 199 199 199 199 199 199 199 199 199 199 → TROUBLE! WRONG VALUE Ref 199: RGB 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 199 200 200 200 199 200 200 200 200 200 200 199 200 200 200 200 200 200 200 200 200 200 200 200 → TROUBLE! WRONG VALUE Ref 200: RGB 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 200 201 201 201 200 201 201 201 201 201 201 200 201 201 201 201 201 201 201 201 201 201 201 201 → TROUBLE! WRONG VALUE Ref 201: RGB 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 201 202 202 202 201 202 202 202 202 202 202 201 202 202 202 202 202 202 202 202 202 202 202 202 → TROUBLE! WRONG VALUE Ref 202: RGB 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 202 203 203 203 202 203 203 203 203 203 203 202 203 203 203 203 203 203 203 203 203 203 203 203 → TROUBLE! WRONG VALUE Ref 203: RGB 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 203 204 204 204 203 204 204 204 204 204 204 203 204 204 204 204 204 204 204 204 204 204 204 204 → TROUBLE! WRONG VALUE Ref 204: RGB 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 204 205 205 205 204 205 205 205 205 205 205 204 205 205 205 205 205 205 205 205 205 205 205 205 → TROUBLE! WRONG VALUE Ref 205: RGB 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 205 206 206 206 205 206 206 206 206 206 206 205 206 206 206 206 206 206 206 206 206 206 206 206 → TROUBLE! WRONG VALUE Ref 206: RGB 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 206 207 207 207 206 207 207 207 207 207 207 206 207 207 207 207 207 207 207 207 207 207 207 207 → TROUBLE! WRONG VALUE Ref 207: RGB 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 207 208 208 208 207 208 208 208 208 208 208 207 208 208 208 208 208 208 208 208 208 208 208 208 → TROUBLE! WRONG VALUE Ref 208: RGB 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 208 209 209 209 208 209 209 209 209 209 209 208 209 209 209 209 209 209 209 209 209 209 209 209 → TROUBLE! WRONG VALUE Ref 209: RGB 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 209 210 210 210 209 210 210 210 210 210 210 209 210 210 210 210 210 210 210 210 210 210 210 210 → TROUBLE! WRONG VALUE Ref 210: RGB 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 210 211 211 211 210 211 211 211 211 211 211 210 211 211 211 211 211 211 211 211 211 211 211 211 → TROUBLE! WRONG VALUE Ref 211: RGB 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 211 212 212 212 211 212 212 212 212 212 212 211 212 212 212 212 212 212 212 212 212 212 212 212 → TROUBLE! WRONG VALUE Ref 212: RGB 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 212 213 213 213 212 213 213 213 213 213 213 212 213 213 213 213 213 213 213 213 213 213 213 213 → TROUBLE! WRONG VALUE Ref 213: RGB 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 213 214 214 214 213 214 214 214 214 214 214 213 214 214 214 214 214 214 214 214 214 214 214 214 → TROUBLE! WRONG VALUE Ref 214: RGB 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 214 215 215 215 214 215 215 215 215 215 215 214 215 215 215 215 215 215 215 215 215 215 215 215 → TROUBLE! WRONG VALUE Ref 215: RGB 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 215 216 216 216 215 216 216 216 216 216 216 215 216 216 216 216 216 216 216 216 216 216 216 216 → TROUBLE! WRONG VALUE Ref 216: RGB 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 216 217 217 217 216 217 217 217 217 217 217 216 217 217 217 217 217 217 217 217 217 217 217 217 → TROUBLE! WRONG VALUE Ref 217: RGB 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 217 218 218 218 217 218 218 218 218 218 218 217 218 218 218 218 218 218 218 218 218 218 218 218 → TROUBLE! WRONG VALUE Ref 218: RGB 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 218 219 219 219 218 219 219 219 219 219 219 218 219 219 219 219 219 219 219 219 219 219 219 219 → TROUBLE! WRONG VALUE Ref 219: RGB 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 219 220 220 220 219 220 220 220 220 220 220 219 220 220 220 220 220 220 220 220 220 220 220 220 → TROUBLE! WRONG VALUE Ref 220: RGB 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 220 221 221 221 220 221 221 221 221 221 221 220 221 221 221 221 221 221 221 221 221 221 221 221 → TROUBLE! WRONG VALUE Ref 221: RGB 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 221 222 222 222 221 222 222 222 222 222 222 221 222 222 222 222 222 222 222 222 222 222 222 222 → TROUBLE! WRONG VALUE Ref 222: RGB 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 222 223 223 223 222 223 223 223 223 223 223 222 223 223 223 223 223 223 223 223 223 223 223 223 → TROUBLE! WRONG VALUE Ref 223: RGB 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 223 224 224 224 223 224 224 224 224 224 224 223 224 224 224 224 224 224 224 224 224 224 224 224 → TROUBLE! WRONG VALUE Ref 224: RGB 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 224 225 225 225 224 225 225 225 225 225 225 224 225 225 225 225 225 225 225 225 225 225 225 225 → TROUBLE! WRONG VALUE Ref 225: RGB 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 225 226 226 226 225 226 226 226 226 226 226 225 226 226 226 226 226 226 226 226 226 226 226 226 → TROUBLE! WRONG VALUE Ref 226: RGB 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 226 227 227 227 226 227 227 227 227 227 227 226 227 227 227 227 227 227 227 227 227 227 227 227 → TROUBLE! WRONG VALUE Ref 227: RGB 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 227 228 228 227 228 228 228 227 228 228 228 228 228 228 227 228 228 228 228 228 228 228 228 228 228 228 227 → TROUBLE! WRONG VALUE Ref 228: RGB 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 228 229 229 229 228 229 229 229 229 229 229 228 229 229 229 229 229 229 229 229 229 229 229 229 → TROUBLE! WRONG VALUE Ref 229: RGB 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 229 230 230 230 229 230 230 230 230 230 230 229 230 230 230 230 230 230 230 230 230 230 230 230 → TROUBLE! WRONG VALUE ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:05pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/25 "2021-03-30T13:05:04Z")
Ref 230: RGB 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 230 231 231 231 230 231 231 231 231 231 231 230 231 231 231 231 231 231 231 231 231 231 231 231 → TROUBLE! WRONG VALUE Ref 231: RGB 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 231 232 232 232 231 232 232 232 232 232 232 231 232 232 232 232 232 232 232 232 232 232 232 232 → TROUBLE! WRONG VALUE Ref 232: RGB 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 232 233 233 233 232 233 233 233 233 233 233 232 233 233 233 233 233 233 233 233 233 233 233 233 → TROUBLE! WRONG VALUE Ref 233: RGB 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 233 234 234 234 233 234 234 234 234 234 234 233 234 234 234 234 234 234 234 234 234 234 234 234 → TROUBLE! WRONG VALUE Ref 234: RGB 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 234 235 235 235 234 235 235 235 235 235 235 234 235 235 235 235 235 235 235 235 235 235 235 235 → TROUBLE! WRONG VALUE Ref 235: RGB 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 235 236 236 236 235 236 236 236 236 236 236 235 236 236 236 236 236 236 236 236 236 236 236 236 → TROUBLE! WRONG VALUE Ref 236: RGB 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 236 237 237 237 236 237 237 237 237 237 237 236 237 237 237 237 237 237 237 237 237 237 237 237 → TROUBLE! WRONG VALUE Ref 237: RGB 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 237 238 238 238 237 238 238 238 238 238 238 237 238 238 238 238 238 238 238 238 238 238 238 238 → TROUBLE! WRONG VALUE Ref 238: RGB 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 238 239 239 239 238 239 239 239 239 239 239 238 239 239 239 239 239 239 239 239 239 239 239 239 → TROUBLE! WRONG VALUE Ref 239: RGB 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 239 240 240 240 239 240 240 240 240 240 240 239 240 240 240 240 240 240 240 240 240 240 240 240 → TROUBLE! WRONG VALUE Ref 240: RGB 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 240 241 241 241 240 241 241 241 241 241 241 240 241 241 241 241 241 241 241 241 241 241 241 241 → TROUBLE! WRONG VALUE Ref 241: RGB 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 241 242 242 242 241 242 242 242 242 242 242 241 242 242 242 242 242 242 242 242 242 242 242 242 → TROUBLE! WRONG VALUE Ref 242: RGB 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 242 243 243 243 242 243 243 243 243 243 243 242 243 243 243 243 243 243 243 243 243 243 243 243 → TROUBLE! WRONG VALUE Ref 243: RGB 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 243 244 244 243 244 244 244 243 244 244 244 244 244 244 243 244 244 244 244 244 244 244 244 244 244 244 243 → TROUBLE! WRONG VALUE Ref 244: RGB 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 244 245 245 245 244 245 245 245 245 245 245 244 245 245 245 245 245 245 245 245 245 245 245 245 → TROUBLE! WRONG VALUE Ref 245: RGB 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 245 246 246 246 245 246 246 246 246 246 246 245 246 246 246 246 246 246 246 246 246 246 246 246 → TROUBLE! WRONG VALUE Ref 246: RGB 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 246 247 247 247 246 247 247 247 247 247 247 246 247 247 247 247 247 247 247 247 247 247 247 247 → TROUBLE! WRONG VALUE Ref 247: RGB 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 247 248 248 248 247 248 248 248 248 248 248 247 248 248 248 248 248 248 248 248 248 248 248 248 → TROUBLE! WRONG VALUE Ref 248: RGB 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 248 249 249 249 248 249 249 249 249 249 249 248 249 249 249 249 249 249 249 249 249 249 249 249 → TROUBLE! WRONG VALUE Ref 249: RGB 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 249 250 250 250 249 250 250 250 250 250 250 249 250 250 250 250 250 250 250 250 250 250 250 250 → TROUBLE! WRONG VALUE Ref 250: RGB 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 250 251 251 251 250 251 251 251 251 251 251 250 251 251 251 251 251 251 251 251 251 251 251 251 → TROUBLE! WRONG VALUE Ref 251: RGB 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 251 252 252 252 251 252 252 252 252 252 252 251 252 252 252 252 252 252 252 252 252 252 252 252 → TROUBLE! WRONG VALUE Ref 252: RGB 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 252 253 253 253 252 253 253 253 253 253 253 252 253 253 253 253 253 253 253 253 253 253 253 253 → TROUBLE! WRONG VALUE Ref 253: RGB 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 253 254 254 254 253 254 254 254 254 254 254 253 254 254 254 254 254 254 254 254 254 254 254 254 → TROUBLE! WRONG VALUE Ref 254: RGB 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 254 255 255 255 254 255 255 255 255 255 255 254 255 255 255 255 255 255 255 255 255 255 255 255 → TROUBLE! WRONG VALUE Ref 255: RGB 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 WARNING: This session of your experiment was run by you with the setting Screen(‘Preference’, ‘SkipSyncTests’, 1). WARNING: This means that some internal self-tests and calibrations were skipped. Your stimulus presentation timing WARNING: may have been wrong. This is fine for development and debugging of your experiment, but for running the real WARNING: study, please make sure to set Screen(‘Preference’, ‘SkipSyncTests’, 0) for maximum accuracy and reliability. FAILURE! Many wrong pixels detected! Trouble for 254 separate levels!!! ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:33pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/26 "2021-03-30T13:33:31Z")
> [@mariokleiner](#): > > As root user in a terminal (sudo su -), the output of the following commands could be useful: > > `cat /sys/kernel/debug/dri/0/DP-2/output_bpc` > `cat /sys/kernel/debug/dri/0/DP-2/link_settings` > > Replace DP-2 with DP-0, DP-1, DP-3, … and report the output for all that work. Some may just say “file not found”. One of these corresponds to your DisplayPort-2 connected Datapixx, probaby DP-2, but maybe there is an offset in numbering of 1 between the “DisplayPort-” names and the corresponding low-level “DP-” names. > > The full output of `dmesg | grep drm` and `dmesg | grep amd` could also be useful. This is the result from the tests in the terminal: **cat /sys/kernel/debug/dri/0/DP-3/output\_bpc** Current: 8 Maximum: 10 **cat /sys/kernel/debug/dri/0/DP-4/output\_bpc** Current: 8 Maximum: 8 **cat /sys/kernel/debug/dri/0/DP-3/link\_settings** Current: 4 20 0 Verified: 4 20 0 Reported: 4 20 16 Preferred: 0 0 0 **cat /sys/kernel/debug/dri/0/DP-4/link\_settings** Current: 4 6 0 Verified: 4 6 0 Reported: 4 6 16 Preferred: 0 0 0 **dmesg | grep drm** [3.268232] systemd[1]: Starting Load Kernel Module drm… [3.278669] systemd[1]: modprobe@drm.service: Succeeded. [3.278847] systemd[1]: Finished Load Kernel Module drm. [3.829503] [drm] amdgpu kernel modesetting enabled. [3.829720] fb0: switching to amdgpudrmfb from EFI VGA [3.830078] [drm] initializing kernel modesetting (VEGA10 0x1002:0x6861 0x103C:0x0B0F 0x00). [3.830089] [drm] register mmio base: 0xC6000000 [3.830090] [drm] register mmio size: 524288 [3.830101] [drm] add ip block number 0 \ [3.830102] [drm] add ip block number 1 \ [3.830103] [drm] add ip block number 2 \ [3.830103] [drm] add ip block number 3 [3.830104] [drm] add ip block number 4 \ [3.830104] [drm] add ip block number 5 \ [3.830105] [drm] add ip block number 6 [3.830106] [drm] add ip block number 7 [3.830107] [drm] add ip block number 8 \ [3.830107] [drm] add ip block number 9 \ [3.831949] [drm] UVD(0) is enabled in VM mode [3.831949] [drm] UVD(0) ENC is enabled in VM mode [3.831950] [drm] VCE enabled in VM mode [3.831977] [drm] vm size is 262144 GB, 4 levels, block size is 9-bit, fragment size is 9-bit [3.832053] [drm] Detected VRAM RAM=16368M, BAR=16384M [3.832053] [drm] RAM width 2048bits HBM [3.832138] [drm] amdgpu: 16368M of VRAM memory ready [3.832140] [drm] amdgpu: 16368M of GTT memory ready. [3.832147] [drm] GART: num cpu pages 131072, num gpu pages 131072 [3.832229] [drm] PCIE GART of 512M enabled (table at 0x000000F400900000). [3.835034] [drm] use\_doorbell being set to: [true] [3.835442] [drm] use\_doorbell being set to: [true] [3.836512] [drm] Found UVD firmware Version: 66.43 Family ID: 17 [3.836515] [drm] PSP loading UVD firmware [3.837132] [drm] Found VCE firmware Version: 57.6 Binary ID: 4 [3.837169] [drm] PSP loading VCE firmware [4.025052] [drm] reserve 0x400000 from 0xf7fe800000 for PSP TMR [4.126241] [drm] Display Core initialized with v3.2.48! [4.151313] [drm] SADs count is: 0, don’t need to read it [4.223948] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [4.223949] [drm] Driver supports precise vblank timestamp query. [4.245401] [drm] UVD and UVD ENC initialized successfully. [4.345651] [drm] VCE initialized successfully. [4.349838] [drm] fb mappable at 0xC8000CEE000 [4.349839] [drm] vram apper at 0xC8000000000 [4.349839] [drm] size 14745600 [4.349840] [drm] fb depth is 24 [4.349840] [drm] pitch is 10240 [4.349997] fbcon: amdgpudrmfb (fb0) is primary device [4.350169] amdgpu 0000:23:00.0: fb0: amdgpudrmfb frame buffer device [4.365338] [drm] ECC is active. [4.365338] [drm] SRAM ECC is not present. [4.365919] [drm] Initialized amdgpu 3.35.0 20150101 for 0000:23:00.0 on minor 0 **dmesg | grep amd** [0.000000] Linux version 5.4.0-70-lowlatency (buildd@lcy01-amd64-004) (gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #78-Ubuntu SMP PREEMPT Fri Mar 19 15:09:48 UTC 2021 (Ubuntu 5.4.0-70.78-lowlatency 5.4.94) [3.829503] [drm] amdgpu kernel modesetting enabled. [3.829716] amdgpu 0000:23:00.0: remove\_conflicting\_pci\_framebuffers: bar 0: 0xcbfe0000000 → 0xcbfefffffff [3.829717] amdgpu 0000:23:00.0: remove\_conflicting\_pci\_framebuffers: bar 2: 0xcbff0000000 → 0xcbff01fffff [3.829717] amdgpu 0000:23:00.0: remove\_conflicting\_pci\_framebuffers: bar 5: 0xc6000000 → 0xc607ffff [3.829720] fb0: switching to amdgpudrmfb from EFI VGA [3.829916] amdgpu 0000:23:00.0: vgaarb: deactivate vga console [3.829938] amdgpu 0000:23:00.0: enabling device (0146 → 0147) [3.831984] amdgpu 0000:23:00.0: BAR 2: releasing [mem 0xcbff0000000-0xcbff01fffff 64bit pref] [3.831984] amdgpu 0000:23:00.0: BAR 0: releasing [mem 0xcbfe0000000-0xcbfefffffff 64bit pref] [3.832010] amdgpu 0000:23:00.0: BAR 0: assigned [mem 0xc8000000000-0xc83ffffffff 64bit pref] [3.832015] amdgpu 0000:23:00.0: BAR 2: assigned [mem 0xc8400000000-0xc84001fffff 64bit pref] [3.832049] amdgpu 0000:23:00.0: VRAM: 16368M 0x000000F400000000 - 0x000000F7FEFFFFFF (16368M used) [3.832050] amdgpu 0000:23:00.0: GART: 512M 0x0000000000000000 - 0x000000001FFFFFFF [3.832051] amdgpu 0000:23:00.0: AGP: 267419648M 0x000000F800000000 - 0x0000FFFFFFFFFFFF [3.832138] [drm] amdgpu: 16368M of VRAM memory ready [3.832140] [drm] amdgpu: 16368M of GTT memory ready. [3.835494] amdgpu: [powerplay] hwmgr\_sw\_init smu backed is vega10\_smu [4.126366] snd\_hda\_intel 0000:23:00.1: bound 0000:23:00.0 (ops amdgpu\_dm\_audio\_component\_bind\_ops [amdgpu]) [4.349997] fbcon: amdgpudrmfb (fb0) is primary device [4.350169] amdgpu 0000:23:00.0: fb0: amdgpudrmfb frame buffer device [4.365317] amdgpu 0000:23:00.0: ring gfx uses VM inv eng 0 on hub 0 [4.365319] amdgpu 0000:23:00.0: ring comp\_1.0.0 uses VM inv eng 1 on hub 0 [4.365320] amdgpu 0000:23:00.0: ring comp\_1.1.0 uses VM inv eng 4 on hub 0 [4.365321] amdgpu 0000:23:00.0: ring comp\_1.2.0 uses VM inv eng 5 on hub 0 [4.365321] amdgpu 0000:23:00.0: ring comp\_1.3.0 uses VM inv eng 6 on hub 0 [4.365322] amdgpu 0000:23:00.0: ring comp\_1.0.1 uses VM inv eng 7 on hub 0 [4.365323] amdgpu 0000:23:00.0: ring comp\_1.1.1 uses VM inv eng 8 on hub 0 [4.365324] amdgpu 0000:23:00.0: ring comp\_1.2.1 uses VM inv eng 9 on hub 0 [4.365325] amdgpu 0000:23:00.0: ring comp\_1.3.1 uses VM inv eng 10 on hub 0 [4.365326] amdgpu 0000:23:00.0: ring kiq\_2.1.0 uses VM inv eng 11 on hub 0 [4.365327] amdgpu 0000:23:00.0: ring sdma0 uses VM inv eng 0 on hub 1 [4.365328] amdgpu 0000:23:00.0: ring page0 uses VM inv eng 1 on hub 1 [4.365329] amdgpu 0000:23:00.0: ring sdma1 uses VM inv eng 4 on hub 1 [4.365330] amdgpu 0000:23:00.0: ring page1 uses VM inv eng 5 on hub 1 [4.365331] amdgpu 0000:23:00.0: ring uvd\_0 uses VM inv eng 6 on hub 1 [4.365332] amdgpu 0000:23:00.0: ring uvd\_enc\_0.0 uses VM inv eng 7 on hub 1 [4.365333] amdgpu 0000:23:00.0: ring uvd\_enc\_0.1 uses VM inv eng 8 on hub 1 [4.365334] amdgpu 0000:23:00.0: ring vce0 uses VM inv eng 9 on hub 1 [4.365335] amdgpu 0000:23:00.0: ring vce1 uses VM inv eng 10 on hub 1 [4.365336] amdgpu 0000:23:00.0: ring vce2 uses VM inv eng 11 on hub 1 [4.365919] [drm] Initialized amdgpu 3.35.0 20150101 for 0000:23:00.0 on minor 0 ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 1:58pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/27 "2021-03-30T13:58:19Z")
> [@mariokleiner](#): > > You said that VBLSyncTest with usedpixx 2 worked with a 10 bpc framebuffer? Or did i misunderstand that? It is correct, VBLSyncTest with usedpixx 2 works with a 10 bpc framebuffer. I reported this discrepancy between 8 and 10 bits to datapixx support and they told me that with 10 bits it is probably working because Psynch is simpy bypass. They insist that I should be able to run the `DatapixxGPUDitheringpatternTest` succesfully before running the VBLSyncTest. > The xorg.config file looks ok, except that it enforces DRI-2, which is not the default, but that should not matter for this problem. It also enforces a specific video mode, which seems to be non-native to your display monitors? When I run the XOrgConfCreator I selected “no” as option to the DRI. Whatever is written in the configuration file was created automatically. The 1920x1080@120Hz should be one of the possible resolution of the monitor. I’m double checking this step and I will also try to run it at the original resolution. > Have you tried what happens if you don’t enforce 1920x1080@120Hz? This is not the native resolution or refresh rate of the display as far as i can see? Generally it is not advisable to use non-native resolutions on flat panels, as it can cause spatial or temporal aliasing artifacts from the monitors own panel-fitter or temporal resampling. While debugging these issues Datapixx support suggested to run at a lower resolution before moving up to the full resolution. But I guess that this suggestion does not hold anymore. I can have a check what happens with full resolution. ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [March 30, 2021, 2:49pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/28 "2021-03-30T14:49:49Z")
So the Psync mechanism does not actually work for 10 bit input video signals to the Datapixx3? Ok, so all values are off by one, but there’s also some dithering, a very weird pattern. Link quality seems to be optimal and running at maximum bandwidth, so cabling issues are unlikely. What happens if you do this in a terminal… `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 10` … and as root again type: `cat /sys/kernel/debug/dri/0/DP-3/output_bpc` … and then rerun the `clear all; DatapixxGPUDitherPatternTest` – no need to run with higher verbosity anymore, only the regular output. This command should switch the video output into 10 bpc mode, while leaving the framebuffer at regular 8 bpc. Output of `VBLSyncTest` with the usedpixx=2 option would be interesting. Especially the plot and text output reporting the timestamping error between Screen Flip and Datapixx. I should mention btw. that every timing test ever conducted with Psychtoolbox for Linux in over a decade, checking against VPixx devices or other measurement hardware, always showed that the timestamps produced by Screen(‘Flip’) are perfect down to the almost microsecond level. E.g., the agreement between VPixx devices and Screen is usually down to a few dozen microseconds at worst. That is, every measurement run where PTB didn’t complain about any trouble or misconfiguration, of course. So technically if the only use you had for the Psync mechanism would be to verify timing, you’d not actually need it in practice. Ofc. the Psync mechanism is also useful to synchronize things like VPixx builtin sound and i/o, and it is always good to double-check results. Just mentioning… -mario ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 3:08pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/29 "2021-03-30T15:08:31Z")
OK, I will run these tests now. In the meantime I was trying to run the tests with the native resolution as suggested, but after a while the computer started to freeze when running a PTB script. I changed back the secure boot ON and this problem went away. So it seems that having the secure boot disabled might lead to some issues. Antimo ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [March 30, 2021, 3:20pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/30 "2021-03-30T15:20:49Z")
PTB’s wrong code for DCE-12 could cause hw malfunctions. Unless that is fixed, secure boot on would prevent PTB from low-level hw access and avoid such possible issues. As would doing something like `PsychTweak('UseGPUIndex', 10);` from within Matlab. ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 3:34pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/31 "2021-03-30T15:34:17Z")
Here the results. It seems now that the dithering test is passed! Just as check, I used `PsychTweak('UseGPUIndex', 10);` to avoid crashes and tested it with VBLSynch that was working. After that I run the DatapixxGPUDitherpatternTest. The computer is with secure boot disabled at the moment. > [@mariokleiner](#): > > What happens if you do this in a terminal… > > `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 10` > > … and as root again type: > > `cat /sys/kernel/debug/dri/0/DP-3/output_bpc` the command: `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 10` does not return anything sudo su -cat /sys/kernel/debug/dri/0/DP-3/output\_bpc su: user /sys/kernel/debug/dri/0/DP-3/output\_bpc does not exist > … and then rerun the `clear all; DatapixxGPUDitherPatternTest` – no need to run with higher verbosity anymore, only the regular output. This command should switch the video output into 10 bpc mode, while leaving the framebuffer at regular 8 bpc. clear all DatapixxGPUDitherpatternTest BitsPlusPlus: Could not find a Bits# config file under [/home/ziadhafed/.Psychtoolbox/BitsSharpConfig.txt]. Assuming a Bits+ device instead of a Bits# is connected. BitsPlusPlus: Please create a config file under this name if you have a Bits# and want to use it as Bits# instead of as a Bits+. BitsPlusPlus: The most simple way is to create an empty file. A more robust way is to store the name of the Bits# serial port BitsPlusPlus: in the first line of the text file, e.g., COM5 [Windows], or /dev/ttyACM0 [Linux] or similar. PTB-INFO: This is Psychtoolbox-3 for GNU/Linux X11, under Matlab 64-Bit (Version 3.0.17 - Build date: Oct 31 2020). PTB-INFO: OS support status: Linux 5.4.0-70-lowlatency Supported. PTB-INFO: Type ‘PsychtoolboxVersion’ for more detailed version information. PTB-INFO: Most parts of the Psychtoolbox distribution are licensed to you under terms of the MIT License, with PTB-INFO: some restrictions. See file ‘License.txt’ in the Psychtoolbox root folder for the exact licensing conditions. PTB-INFO: For information about paid priority support, community membership and commercial services, please type PTB-INFO: ‘PsychPaidSupportAndServices’. PTB-INFO: Will try to use GPU number 10 for low-level access during this session. PTB-INFO: OpenGL-Renderer is [X.Org](http://X.Org) :: Radeon Pro WX 9100 (VEGA10, DRM 3.35.0, 5.4.0-70-lowlatency, LLVM 11.0.0) :: 4.6 (Compatibility Profile) Mesa 20.2.6 PTB-INFO: VBL startline = 1080 , VBL Endline = -1 PTB-INFO: Will try to use OS-Builtin OpenML sync control support for accurate Flip timestamping. PTB-INFO: Measured monitor refresh interval from VBLsync = 8.333521 ms [119.997299 Hz]. (50 valid samples taken, stddev=0.000651 ms.) PTB-INFO: Reported monitor refresh interval from operating system = 8.333333 ms [120.000000 Hz]. PTB-INFO: Small deviations between reported values are normal and no reason to worry. LoadIdentityClut: Could not use GPU low-level setup for pixel passthrough. Will use fallback. Warning: LoadIdentityClut: Warning! Unknown graphics hardware detected. Set up identity CLUT may be wrong! > In LoadIdentityClut (line 409) > In DatapixxGPUDitherpatternTest (line 68) Ref 0: RGB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Ref 1: RGB 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Ref 2: RGB 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Ref 3: RGB 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Ref 4: RGB 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Ref 5: RGB 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Ref 6: RGB 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 Ref 7: RGB 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 Ref 8: RGB 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 Ref 9: RGB 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 Ref 10: RGB 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 Ref 11: RGB 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 Ref 12: RGB 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 Ref 13: RGB 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 Ref 14: RGB 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 Ref 15: RGB 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 Ref 16: RGB 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Ref 17: RGB 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 Ref 18: RGB 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 Ref 19: RGB 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 Ref 20: RGB 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Ref 21: RGB 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 Ref 22: RGB 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 Ref 23: RGB 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 Ref 24: RGB 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 Ref 25: RGB 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 Ref 26: RGB 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 Ref 27: RGB 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 Ref 28: RGB 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 Ref 29: RGB 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 Ref 30: RGB 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 Ref 31: RGB 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 Ref 32: RGB 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 Ref 33: RGB 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 Ref 34: RGB 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 Ref 35: RGB 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 Ref 36: RGB 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 Ref 37: RGB 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 Ref 38: RGB 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 Ref 39: RGB 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 Ref 40: RGB 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 Ref 41: RGB 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 Ref 42: RGB 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 Ref 43: RGB 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 Ref 44: RGB 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 Ref 45: RGB 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 Ref 46: RGB 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 Ref 47: RGB 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 Ref 48: RGB 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 Ref 49: RGB 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 Ref 50: RGB 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 Ref 51: RGB 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 51 Ref 52: RGB 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 Ref 53: RGB 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 53 Ref 54: RGB 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 Ref 55: RGB 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 Ref 56: RGB 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 56 Ref 57: RGB 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 Ref 58: RGB 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 Ref 59: RGB 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 Ref 60: RGB 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 Ref 61: RGB 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 Ref 62: RGB 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 Ref 63: RGB 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 Ref 64: RGB 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 64 Ref 65: RGB 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 Ref 66: RGB 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 Ref 67: RGB 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 Ref 68: RGB 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 Ref 69: RGB 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 Ref 70: RGB 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 Ref 71: RGB 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 Ref 72: RGB 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 Ref 73: RGB 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 73 Ref 74: RGB 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 74 Ref 75: RGB 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 Ref 76: RGB 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 Ref 77: RGB 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 Ref 78: RGB 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 Ref 79: RGB 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 Ref 80: RGB 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 Ref 81: RGB 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 Ref 82: RGB 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 Ref 83: RGB 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 Ref 84: RGB 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 84 Ref 85: RGB 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 Ref 86: RGB 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 Ref 87: RGB 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 Ref 88: RGB 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 Ref 89: RGB 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 89 Ref 90: RGB 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 Ref 91: RGB 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 91 Ref 92: RGB 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 Ref 93: RGB 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 Ref 94: RGB 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 Ref 95: RGB 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 Ref 96: RGB 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 Ref 97: RGB 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 97 Ref 98: RGB 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 Ref 99: RGB 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 Ref 100: RGB 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Ref 101: RGB 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 Ref 102: RGB 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 Ref 103: RGB 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 103 Ref 104: RGB 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 104 Ref 105: RGB 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 105 Ref 106: RGB 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 Ref 107: RGB 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 Ref 108: RGB 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 Ref 109: RGB 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 109 Ref 110: RGB 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 Ref 111: RGB 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 111 Ref 112: RGB 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 112 Ref 113: RGB 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 113 Ref 114: RGB 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 Ref 115: RGB 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 Ref 116: RGB 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 Ref 117: RGB 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 Ref 118: RGB 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 Ref 119: RGB 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 119 Ref 120: RGB 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 Ref 121: RGB 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 121 Ref 122: RGB 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 Ref 123: RGB 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 Ref 124: RGB 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 124 Ref 125: RGB 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 3:34pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/32 "2021-03-30T15:34:46Z")
Ref 126: RGB 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 Ref 127: RGB 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 Ref 128: RGB 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 Ref 129: RGB 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 129 Ref 130: RGB 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Ref 131: RGB 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 Ref 132: RGB 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 Ref 133: RGB 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 Ref 134: RGB 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 Ref 135: RGB 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 Ref 136: RGB 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 136 Ref 137: RGB 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 Ref 138: RGB 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 Ref 139: RGB 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 139 Ref 140: RGB 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 Ref 141: RGB 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 Ref 142: RGB 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 Ref 143: RGB 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 143 Ref 144: RGB 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 Ref 145: RGB 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 145 Ref 146: RGB 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 Ref 147: RGB 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 147 Ref 148: RGB 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 Ref 149: RGB 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 149 Ref 150: RGB 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 Ref 151: RGB 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 151 Ref 152: RGB 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 Ref 153: RGB 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 Ref 154: RGB 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 154 Ref 155: RGB 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 155 Ref 156: RGB 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 156 Ref 157: RGB 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 157 Ref 158: RGB 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 158 Ref 159: RGB 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 159 Ref 160: RGB 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 160 Ref 161: RGB 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 Ref 162: RGB 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 162 Ref 163: RGB 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 163 Ref 164: RGB 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 Ref 165: RGB 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 165 Ref 166: RGB 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 166 Ref 167: RGB 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 167 Ref 168: RGB 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 168 Ref 169: RGB 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 169 Ref 170: RGB 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 Ref 171: RGB 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 171 Ref 172: RGB 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 172 Ref 173: RGB 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 173 Ref 174: RGB 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 174 Ref 175: RGB 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 Ref 176: RGB 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 176 Ref 177: RGB 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177 Ref 178: RGB 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 178 Ref 179: RGB 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 179 Ref 180: RGB 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 Ref 181: RGB 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 Ref 182: RGB 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 182 Ref 183: RGB 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 183 Ref 184: RGB 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 184 Ref 185: RGB 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 Ref 186: RGB 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 186 Ref 187: RGB 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 187 Ref 188: RGB 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 188 Ref 189: RGB 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 189 Ref 190: RGB 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 190 Ref 191: RGB 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 191 Ref 192: RGB 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192 Ref 193: RGB 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 193 Ref 194: RGB 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 Ref 195: RGB 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 195 Ref 196: RGB 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 196 Ref 197: RGB 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 197 Ref 198: RGB 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 Ref 199: RGB 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 Ref 200: RGB 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 Ref 201: RGB 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 201 Ref 202: RGB 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 202 Ref 203: RGB 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 203 Ref 204: RGB 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 204 Ref 205: RGB 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 205 Ref 206: RGB 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 206 Ref 207: RGB 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 207 Ref 208: RGB 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 208 Ref 209: RGB 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 Ref 210: RGB 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 3:34pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/33 "2021-03-30T15:34:57Z")
Ref 211: RGB 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 Ref 212: RGB 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 212 Ref 213: RGB 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 213 Ref 214: RGB 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 Ref 215: RGB 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 215 Ref 216: RGB 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 216 Ref 217: RGB 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 Ref 218: RGB 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 218 Ref 219: RGB 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 219 Ref 220: RGB 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 220 Ref 221: RGB 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 221 Ref 222: RGB 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 222 Ref 223: RGB 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 223 Ref 224: RGB 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 224 Ref 225: RGB 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 225 Ref 226: RGB 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 226 Ref 227: RGB 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 Ref 228: RGB 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 Ref 229: RGB 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 229 Ref 230: RGB 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 Ref 231: RGB 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 231 Ref 232: RGB 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 Ref 233: RGB 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 Ref 234: RGB 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 234 Ref 235: RGB 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 Ref 236: RGB 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 236 Ref 237: RGB 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 237 Ref 238: RGB 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 238 Ref 239: RGB 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 239 Ref 240: RGB 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 Ref 241: RGB 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 241 Ref 242: RGB 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 Ref 243: RGB 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 243 Ref 244: RGB 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 244 Ref 245: RGB 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 245 Ref 246: RGB 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 246 Ref 247: RGB 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 247 Ref 248: RGB 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 Ref 249: RGB 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 249 Ref 250: RGB 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 Ref 251: RGB 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 251 Ref 252: RGB 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 252 Ref 253: RGB 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 253 Ref 254: RGB 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 254 Ref 255: RGB 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 INFO: PTB’s Screen(‘Flip’, 10) command seems to have missed the requested stimulus presentation deadline INFO: a total of 72 times out of a total of 256 flips during this session. INFO: This number is fairly accurate (and indicative of real timing problems in your own code or your system) INFO: if you provided requested stimulus onset times with the ‘when’ argument of Screen(‘Flip’, window [, when]); INFO: If you called Screen(‘Flip’, window); without the ‘when’ argument, this count is more of a ‘‘mild’’ indicator INFO: of timing behaviour than a hard reliable measurement. Large numbers may indicate problems and should at least INFO: deserve your closer attention. Cfe. ‘help SyncTrouble’, the FAQ section at [www.psychtoolbox.org](http://www.psychtoolbox.org) and the INFO: examples in the PDF presentation in PsychDocumentation/Psychtoolbox3-Slides.pdf for more info and timing tips. WARNING: This session of your experiment was run by you with the setting Screen(‘Preference’, ‘SkipSyncTests’, 1). WARNING: This means that some internal self-tests and calibrations were skipped. Your stimulus presentation timing WARNING: may have been wrong. This is fine for development and debugging of your experiment, but for running the real WARNING: study, please make sure to set Screen(‘Preference’, ‘SkipSyncTests’, 0) for maximum accuracy and reliability. ALL GOOD 🙂 ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 30, 2021, 3:43pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/34 "2021-03-30T15:43:33Z")
Also, I’m still running at “1920x1080\_120.00”. ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [March 30, 2021, 5:17pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/35 "2021-03-30T17:17:16Z")
Ok, progress! I think i know what goes wrong now. Run this again, but this time actually after logging in as root via `sudo su -`. You used that wrong `cat /sys/kernel/debug/dri/0/DP-3/output_bpc` or if you wish: `sudo cat /sys/kernel/debug/dri/0/DP-3/output_bpc` …to confirm we are at “Current bpc: 10” for a 10 bit Displayport signal. Then exit and restart Matlab and run `DatapixxGPUDitherPatternTest` again. Lets see if it still works without that PsychTweak command, which i suspect was key, so i’d expect probable failure/dithering/wrong values again. Then you can try this: `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 8` `sudo cat /sys/kernel/debug/dri/0/DP-3/output_bpc` → to confirm we are back at “Current bpc: 8” instead of 10. `DatapixxGPUDitherPatternTest` should probably still fail. Then after executing `PsychTweak('UseGPUIndex', 10);` again, it should work again. -mario ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 31, 2021, 9:04am UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/37 "2021-03-31T09:04:39Z")
Hi Mario, I run the suggested tests. If I first set the `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 10`, then I run `PsychTweak('UseGPUIndex', 10);` and finally the `DatapixxGPUDitherpatternTest`, the outcome is successful. If I don’t run the `PsychTweak('UseGPUIndex', 10);` before the dithering test, it fails. Setting the `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 8` causes the `DatapixxGPUDitherpatternTest` to always fail, with or without the `PsychTweak(‘UseGPUIndex’, 10); run before it. Does this make sense to you? Thanks, Antimo ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [March 31, 2021, 3:41pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/38 "2021-03-31T15:41:43Z")
> [@antimo](#): > > Hi Mario, > > I run the suggested tests. > > If I first set the `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 10`, then I run `PsychTweak('UseGPUIndex', 10);` and finally the `DatapixxGPUDitherpatternTest`, the outcome is successful. If I don’t run the `PsychTweak('UseGPUIndex', 10);` before the dithering test, it fails. That’s good. Get the following LoadIdentityClut.m file and replace your copy in Psychtoolbox/PsychOnliners/ with it. Then rerun this specific test, after quitting and restarting Matlab, _without_ the PsychTweak command, and see if it works. The bug-fixed LoadIdentityClut.m should make the PsychTweak workaround probably unneccessary. In theory the broken Vega DCE-12 handling could still interfere, in which case enabling Secure Boot would do the trick to prevent that. [https://raw.githubusercontent.com/kleinerm/Psychtoolbox-3/master/Psychtoolbox/PsychOneliners/LoadIdentityClut.m](https://raw.githubusercontent.com/kleinerm/Psychtoolbox-3/master/Psychtoolbox/PsychOneliners/LoadIdentityClut.m) > [@](#): > > Setting the `xrandr --screen 1 --output DisplayPort-2 --set 'max bpc' 8` causes the `DatapixxGPUDitherpatternTest` to always fail, with or without the `PsychTweak(‘UseGPUIndex’, 10); run before it. > > Does this make sense to you? That is not good. While after installing the new LoadIdentityClut.m again the PsychTweak should be no longer needed, i hoped this would also work with ‘max bpc’ 8. What is the output of DatapixxGPUDitherpatternTest in this failing case? Btw. it would be good if your lab could buy some more priority support if possible. So far you got more than 5 hours of free work on top of the paid work, so we are actively losing money by me helping you. -mario [Work time spent so far: At least 6.5 hours and one vacation day :/] ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [March 31, 2021, 4:08pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/39 "2021-03-31T16:08:41Z")
> [@mariokleiner](#): > > Btw. it would be good if your lab could buy some more priority support if possible. So far you got more than 5 hours of free work on top of the paid work, so we are actively losing money by me helping you. > > -mario > > [Work time spent so far: At least 6.5 hours and one vacation day :/] Hi Mario, we really appreciate your help and understand the amount of work behind it. At the start we understood that priority support was “on a problem” base, but now it’s based on work hours. As I said, we understand this, but since the problem seems to be rather complex we would like to know an estimate of how many priority support payments are required. In principle we are OK, but we would like to have a more concrete idea. Thanks a lot for your help, Antimo ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [March 31, 2021, 6:00pm UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/40 "2021-03-31T18:00:56Z")
In the end it is always based on work hours. The actual text in the online shop entitles you to up to a total of 1 hour of my work time, distributed over 1, 2 or 3 separate problems/questions whatever comes first. But the hard limit is that hour. Everything beyond that is basically at my discretion, because beyond one hour we start to lose money instead of earning it. The idea behind all this is that many labs should buy the community membership with priority support, without using the actual priority support at all, or to its full extent, because whatever is left-over is used for general improvements and maintenance on Psychtoolbox, Linux etc., iow. to improve the quality and health of PTB and Linux for neuroscience. In general i am lenient and don’t cut off at 1 hour, but give a bit more time, because we want problems solved and happy users. But sometimes this gets excessive, when supposedly small problems creep into big problems. And with “sometimes” i unfortunately mean so far this happened most of the times when somebody asked for priority support. The whole thing is not really making us money so far, and we are not exactly drowning in money, far from it. I hope this is all just a slow start, also affected by the pandemic and lab shutdowns etc., and more labs will chip in during this year or we will have to make radical changes. Anyway, if you want to buy more support or not is up to you, you are not mandated to do so, i’m just pointing this out, less to you specifically, and more to whoever else follows this thread, as a public service announcement if you want. But to break even for your specific case - me only losing a day of my eastern vacation, but the project not losing money, you’d have to buy the equivalent of at least 5 hours more time, or at least 4 more licenses without asking for any more work. Proceed as you wish… Btw. so far it looks like while some of the root cause of this problem is caused by the specific choice of a Vega gpu, some of the causes are related to specifically the Datapixx3 as a Displayport 10 bpc video sink, and its interactions with modern graphics hardware in general. I think much more work may be needed in the future on these issues, especially on more modern graphics cards and future operating systems, even if we happen to find a workaround for your specific setup. Or some substantial firmware changes to the device by VPixx, possibly both. Could you provide me with the additional test results i asked for, today if possible? I want to wrap this up and finally spend vacation with more “vacationy” things. -mario ---
**Author:** ![antimo](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@antimo](https://psychtoolbox.discourse.group/u/antimo)\ **Post date:** [April 1, 2021, 8:10am UTC](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760/41 "2021-04-01T08:10:50Z")
> [@mariokleiner](#): > > That’s good. Get the following LoadIdentityClut.m file and replace your copy in Psychtoolbox/PsychOnliners/ with it. Then rerun this specific test, after quitting and restarting Matlab, _without_ the PsychTweak command, and see if it works. The bug-fixed LoadIdentityClut.m should make the PsychTweak workaround probably unneccessary. In theory the broken Vega DCE-12 handling could still interfere, in which case enabling Secure Boot would do the trick to prevent that. > > [https://raw.githubusercontent.com/kleinerm/Psychtoolbox-3/master/Psychtoolbox/PsychOneliners/LoadIdentityClut.m](https://raw.githubusercontent.com/kleinerm/Psychtoolbox-3/master/Psychtoolbox/PsychOneliners/LoadIdentityClut.m) Hi Mario, the test above went as you predicted. With the new table, no PsychTweak, and max bpc 10, the `DatapixxGPUDitherpatternTest` fails if the secure boot is disabled but it succeeds with the secure boot enabled. > That is not good. While after installing the new LoadIdentityClut.m again the PsychTweak should be no longer needed, i hoped this would also work with ‘max bpc’ 8. > > What is the output of DatapixxGPUDitherpatternTest in this failing case? On the other hand, using the ‘max bpc’ 8 still fails. I will attach the result in the next message. > Btw. it would be good if your lab could buy some more priority support if possible. So far you got more than 5 hours of free work on top of the paid work, so we are actively losing money by me helping you. We are checking what we can do. Thanks a lot! Antimo [Previous page](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760.md?page=1) [Next page](https://psychtoolbox.discourse.group/t/dithering-issue-with-amd-graphic-card-linux-ubuntu/3760.md?page=3)