Dear all, I really need some help…
computer: ACPI x64-based PC
Display adaptors: Intel(R) UHD Graphics 630
NVIDIA GeForce RTX 2060 SUPER
PTB-WARNING: Couldn't determine end-line of vertical blanking interval for your display! Trouble with beamposition queries?!? PTB-WARNING: Detected end-line is 1199, which is either lower or more than 1.250000 times higher than vbl startline 1500 --> Out of sane range! PTB-INFO: OpenGL-Renderer is NVIDIA Corporation :: NVIDIA GeForce RTX 2060 SUPER/PCIe/SSE2 :: 4.6.0 NVIDIA 471.35 PTB-INFO: VBL startline = 1500 , VBL Endline = 1199 PTB-INFO: Beamposition queries unsupported or defective on this system. Using basic timestamping as fallback. PTB-INFO: Timestamps returned by Screen('Flip') will be therefore less robust and accurate. PTB-INFO: Measured monitor refresh interval from VBLsync = 16.675296 ms [59.968950 Hz]. (50 valid samples taken, stddev=0.203075 ms.) PTB-INFO: Reported monitor refresh interval from operating system = 16.949153 ms [59.000000 Hz]. PTB-INFO: Small deviations between reported values are normal and no reason to worry. PTB-INFO: Support for OpenGL 3D graphics rendering enabled: depth-buffer and stencil buffer attached. PTB-INFO: ============================================================================================================================== PTB-INFO: WINDOWS DWM DESKTOP COMPOSITOR IS ACTIVE. On this Windows-10 or later system, Psychtoolbox can no longer reliably detect if PTB-INFO: this will cause trouble for timing and integrity of visual stimuli or not. You might be just fine, or you could be in trouble. PTB-INFO: Use external measurement equipment and independent procedures to verify reliability of timing if you care about proper timing. PTB-INFO: ============================================================================================================================== WARNING: Couldn't compute a reliable estimate of monitor refresh interval! Trouble with VBL syncing?!? ----- ! PTB - ERROR: SYNCHRONIZATION FAILURE ! ----- One or more internal checks (see Warnings above) indicate that synchronization of Psychtoolbox to the vertical retrace (VBL) is not working on your setup.