I'm getting warnings about window 10 not using pageflipping for flip. Here's the trace from DotDemo with Screen('Preference','Verbosity',10) running in Ubuntu 16.04 under XFCE with compositing turned off. I've read through the SyncTrouble documentation for Linux and have tried to implement the various suggestions (e.g., running XOrgConfCreator, making sure triple-buffering is off) but can't seem to solve the problem. Can you provide any suggestions?
Thank you for your time,
Josh Shive
DotDemo
RandR: 1366x768 (0x4d) 76.5MHz
h: width 1366 start 1402 end 1450 total 1546 skew 0
v: height 768 start 771 end 776 total 824
PTB-INFO: This is Psychtoolbox-3 for GNU/Linux X11, under GNU/Octave 32-Bit (Version 3.0.14 - Build date: Jan 5 2017).
PTB-INFO: Support status on this operating system release: Linux 4.8.0-46-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-DEBUG: Checking PCI device [Intel Corporation 3rd Gen Core processor DRAM Controller] with class x00060000 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 3rd Gen Core processor Graphics Controller] with class x00030000 ...
PTB-INFO: Skipping detected Intel GPU for safety reasons. setenv('PSYCH_ALLOW_DANGEROUS', '1') to override.
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller] withclass x000c0330 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1] with class x00078000 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family KT Controller] with class x00070002 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 82579LM Gigabit Network Connection] with class x00020000 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2] with class x000c0320 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller] with class x00040300 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1] with class x00060400 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2] with class x00060400 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3] with class x00060400 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4] with class x00060400 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 6] with class x00060400 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1] with class x000c0320 ...
PTB-DEBUG: Checking PCI device [Intel Corporation QM77 Express Chipset LPC Controller] with class x00060100 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 82801 Mobile SATA Controller [RAID mode]] with class x00010400 ...
PTB-DEBUG: Checking PCI device [Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller] with class x000c0500 ...
PTB-DEBUG: Checking PCI device [Intel Corporation Centrino Advanced-N + WiMAX 6250 [Kilmer Peak]] with class x00028000 ...
PTB-DEBUG: Checking PCI device [O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS SD/MMC Card Reader Controller] with class x00080501 ...
PTB-INFO: No low-level controllable GPU on screenId 0. Beamposition timestamping and other special functions disabled.
PTB-INFO: Using old-style override-redirect setup path for onscreen window creation.
PTB-INFO: GLX Visual info depths is 24 bits
PTB-INFO: Running on Mesa version 12.0.6
PTB-INFO: This combo of X-Server and Mesa is considered safe for use under DRI3/Present.
PTB-INFO: Using GLEW version 2.0.0 for automatic detection of OpenGL extensions...
PTB-INFO: Using GLX_MESA_swap_control extension for control of vsync.
PTB-INFO: INTEL_swap_event support for additional swap completion correctness checks enabled.
PTB-DEBUG: PPM file magic is P6
-> Ok
# CREATOR: GIMP PNM Filter Version 1.1
PTB-DEBUG: Recognized splash image of 656 x 304 pixels, maxlevel 255. Loading...
OpenGL-Vendor / renderer / version are: Intel Open Source Technology Center - Mesa DRI Intel(R) Ivybridge Mobile x86/MMX/SSE2 - 3.0 Mesa 12.0.6
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_polygon_offset 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_3DFX_texture_compression_FXT1 GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_transpose_matrixGL_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_EXT_stencil_two_side GL_EXT_texture_cube_map GL_NV_depth_clamp GL_APPLE_packed_pixels GL_APPLE_vertex_array_object 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_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_separateGL_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_EXT_packed_float GL_EXT_pixel_buffer_object GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_rgtc 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_APPLE_object_purgeable GL_ARB_vertex_array_object GL_ATI_separate_stencil GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_gpu_program_parameters GL_EXT_texture_array GL_EXT_texture_integer GL_EXT_texture_sRGB_decode GL_EXT_timer_query GL_OES_EGL_image GL_AMD_performance_monitor 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_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_draw_buffers_blend GL_AMD_seamless_cubemap_per_texture GL_ARB_ES2_compatibility GL_ARB_blend_func_extended 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_texture_lod 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_revGL_EXT_provoking_vertex GL_EXT_texture_snorm GL_MESA_texture_signed_rgba GL_NV_texture_barrier GL_ARB_get_program_binary GL_ARB_robustness GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_texture_compression_bptc GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 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_420packGL_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_shader_trinary_minmax 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_framebuffer_no_attachments GL_ARB_invalidate_subdata GL_ARB_program_interface_query GL_ARB_shader_image_size GL_ARB_shader_storage_buffer_object 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_ARB_buffer_storage GL_ARB_clear_texture GL_ARB_internalformat_query2 GL_ARB_multi_bind GL_ARB_seamless_cubemap_per_texture GL_ARB_shader_draw_parameters GL_ARB_texture_mirror_clamp_to_edge GL_ARB_vertex_type_10f_11f_11f_rev GL_EXT_shader_integer_mix GL_INTEL_performance_query GL_ARB_clip_control GL_ARB_conditional_render_inverted GL_ARB_cull_distance GL_ARB_derivative_control GL_ARB_get_texture_sub_image GL_ARB_pipeline_statistics_query GL_ARB_shader_texture_image_samples GL_ARB_texture_barrier GL_EXT_polygon_offset_clamp GL_KHR_context_flush_control GL_ARB_shader_clock GL_EXT_shader_samples_identical
PTB-DEBUG: Linux X11 backend with FOSS drivers - Enabling locked pixeltoken-write + flush workaround for XLib thread-safety.
PTB-DEBUG: Interrogating Low-level renderer capabilities for onscreen window with handle 10:
Indicator variables: FBO's 1, ATI_texture_float 1, ARB_texture_float 1, Vendor Intel Open Source Technology Center, Renderer Mesa DRI Intel(R) Ivybridge Mobile x86/MMX/SSE2.
Indicator variables: maxcolorattachments = 8, maxrectangletexturesize = 4096, maxnativealuinstructions = 1024.
GPU supports non-power-of-two textures.
Hardware supports signed normalized textures of 16 bpc integer format.
Basic framebuffer objects with rectangle texture rendertargets supported --> RGBA8 rendertargets with blending.
Framebuffer objects support fast blitting between each other.
Framebuffer objects support anti-aliasing via multisampling.
Framebuffer objects support single-pass multisample resolve blits and image rescaling.
Hardware supports floating point textures of 16bpc and 32bpc float format.
Assuming HD graphics core or later: Hardware supports full 16/32 bit floating point textures, frame buffers, filtering and blending, as well as some 32 bit float shading.
PTB-Info: Running on 'The X.Org Foundation' XServer, Vendor release 11804000.
OML_sync_control indicators: glXGetSyncValuesOML=0xb3b93b90 , glXWaitForMscOML=0xb3b93d40, glXWaitForSbcOML=0xb3b93e50, glXSwapBuffersMscOML=0xb3b93c00
OML_sync_control indicators: glxewIsSupported() says 1.
System supports OpenML OML_sync_control extension for high-precision scheduled swaps and timestamping.
OpenML OML_sync_control extension enabled for all scheduled swaps.
PTB-DEBUG: Interrogation done.
RandR: 1366x768 (0x4d) 76.5MHz
h: width 1366 start 1402 end 1450 total 1546 skew 0
v: height 768 start 771 end 776 total 824
RandR: 1366x768 (0x4d) 76.5MHz
h: width 1366 start 1402 end 1450 total 1546 skew 0
v: height 768 start 771 end 776 total 824
PTB-DEBUG: glClear splash image top-left reference pixel: 255 255 255
PTB-WARNING: Flip for window 10 didn't use pageflipping for flip. Visual presentation timing and timestamps are likely unreliable!
PTB-WARNING: Something is misconfigured on your system, otherwise pageflipping would have been used by the graphics driver for reliable timing.
PTB-WARNING: Read the Linux specific section of 'help SyncTrouble' for some common causes and fixes for this problem.
PTB-DEBUG: Output of all acquired samples of calibration run follows:
PTB-DEBUG: Sample 0: 0.000000
PTB-DEBUG: Sample 1: 0.016759
PTB-DEBUG: Sample 2: 0.016760
PTB-DEBUG: Sample 3: 0.016758
PTB-DEBUG: Sample 4: 0.016762
PTB-DEBUG: Sample 5: 0.016758
PTB-DEBUG: Sample 6: 0.016761
PTB-DEBUG: Sample 7: 0.016762
PTB-DEBUG: Sample 8: 0.016754
PTB-DEBUG: Sample 9: 0.016753
PTB-DEBUG: Sample 10: 0.016764
PTB-DEBUG: Sample 11: 0.016758
PTB-DEBUG: Sample 12: 0.016756
PTB-DEBUG: Sample 13: 0.016765
PTB-DEBUG: Sample 14: 0.016754
PTB-DEBUG: Sample 15: 0.016758
PTB-DEBUG: Sample 16: 0.016756
PTB-DEBUG: Sample 17: 0.016765
PTB-DEBUG: Sample 18: 0.016757
PTB-DEBUG: Sample 19: 0.016759
PTB-DEBUG: Sample 20: 0.016752
PTB-DEBUG: Sample 21: 0.016758
PTB-DEBUG: Sample 22: 0.016759
PTB-DEBUG: Sample 23: 0.016760
PTB-DEBUG: Sample 24: 0.016761
PTB-DEBUG: Sample 25: 0.016761
PTB-DEBUG: Sample 26: 0.016753
PTB-DEBUG: Sample 27: 0.016771
PTB-DEBUG: Sample 28: 0.016756
PTB-DEBUG: Sample 29: 0.016757
PTB-DEBUG: Sample 30: 0.016759
PTB-DEBUG: Sample 31: 0.016754
PTB-DEBUG: Sample 32: 0.016766
PTB-DEBUG: Sample 33: 0.016759
PTB-DEBUG: Sample 34: 0.016755
PTB-DEBUG: Sample 35: 0.016755
PTB-DEBUG: Sample 36: 0.016762
PTB-DEBUG: Sample 37: 0.016768
PTB-DEBUG: Sample 38: 0.016756
PTB-DEBUG: Sample 39: 0.016761
PTB-DEBUG: Sample 40: 0.016758
PTB-DEBUG: Sample 41: 0.016754
PTB-DEBUG: Sample 42: 0.016762
PTB-DEBUG: Sample 43: 0.016757
PTB-DEBUG: Sample 44: 0.016761
PTB-DEBUG: Sample 45: 0.016761
PTB-DEBUG: Sample 46: 0.016758
PTB-DEBUG: Sample 47: 0.016755
PTB-DEBUG: Sample 48: 0.016761
PTB-DEBUG: Sample 49: 0.016760
PTB-DEBUG: Sample 50: 0.016755
PTB-DEBUG: End of calibration data for this run...
PTB-INFO: OpenGL-Renderer is Intel Open Source Technology Center :: Mesa DRI Intel(R) Ivybridge Mobile x86/MMX/SSE2 :: 3.0 Mesa 12.0.6
PTB-INFO: VBL startline = 768 , 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 = 16.758919 ms [59.669721 Hz]. (50 valid samples taken, stddev=0.003986 ms.)
PTB-INFO: Reported monitor refresh interval from operating system = 16.652790 ms [60.049999 Hz].
PTB-INFO: Small deviations between reported values are normal and no reason to worry.
PTB-INFO: Support for fast OffscreenWindows enabled.
PTB-WARNING: Flip for window 10 didn't use pageflipping for flip. Visual presentation timing and timestamps are likely unreliable!
PTB-WARNING: Something is misconfigured on your system, otherwise pageflipping would have been used by the graphics driver for reliable timing.
PTB-WARNING: Read the Linux specific section of 'help SyncTrouble' for some common causes and fixes for this problem.
PTB-WARNING: Flip for window 10 didn't use pageflipping for flip. Visual presentation timing and timestamps are likely unreliable!
PTB-WARNING: Something is misconfigured on your system, otherwise pageflipping would have been used by the graphics driver for reliable timing.
PTB-WARNING: Read the Linux specific section of 'help SyncTrouble' for some common causes and fixes for this problem.
PTB-WARNING: Flip for window 10 didn't use pageflipping for flip. Visual presentation timing and timestamps are likely unreliable!
PTB-WARNING: Something is misconfigured on your system, otherwise pageflipping would have been used by the graphics driver for reliable timing.
PTB-WARNING: Read the Linux specific section of 'help SyncTrouble' for some common causes and fixes for this problem.
RandR: 1366x768 (0x4d) 76.5MHz
h: width 1366 start 1402 end 1450 total 1546 skew 0
v: height 768 start 771 end 776 total 824
RandR: 1366x768 (0x4d) 76.5MHz
h: width 1366 start 1402 end 1450 total 1546 skew