I am using a MacBook pro with the following specs:
I have installed Matlab 2021a and PST version:
'3.0.17 - Flavor: beta - Corresponds to SVN Revision 12153 For more info visit: https://github.com/Psychtoolbox-3/Psychtoolbox-3'
I am trying to runt his example here and after executing the command
window, windowRect] = PsychImaging('OpenWindow', screenNumber, grey);, i get the following traceback:
PTB-INFO: This is Psychtoolbox-3 for Apple OS X, under Matlab 64-Bit (Version 3.0.17 - Build date: Apr 18 2021).
PTB-INFO: OS support status: OSX version 11.0 is not yet tested or officially supported at all for this Psychtoolbox release.
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: Installation of the PsychtoolboxKernelDriver is strongly recommended if you care about precise visual
PTB-INFO: onset timestamping or timing. See ‘help PsychtoolboxKernelDriver’ for installation instructions.
PTB-INFO: OpenGL-Renderer is ATI Technologies Inc. :: AMD Radeon Pro 5500M OpenGL Engine :: 2.1 ATI-4.6.20
PTB-INFO: Renderer has 4080 MB of VRAM and a maximum 3829 MB of texture memory.
PTB-INFO: VBL startline = 1080 , VBL Endline = -1
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 = 16.665355 ms [60.004722 Hz]. (299 valid samples taken, stddev=0.770480 ms.)
PTB-INFO: Reported monitor refresh interval from operating system = 16.666667 ms [60.000000 Hz].
PTB-INFO: Small deviations between reported values are normal and no reason to worry.
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.
This will seriously impair proper stimulus presentation and stimulus presentation timing!
Please read ‘help SyncTrouble’ for information about how to solve or work-around the problem.
You can force Psychtoolbox to continue, despite the severe problems, by adding the command
Screen(‘Preference’, ‘SkipSyncTests’, 1); at the top of your script, if you really know what you are doing.
Error using Screen
See error message printed above.
Error in PsychImaging (line 2330)
[win, winRect] = Screen(‘OpenWindow’, screenid, clearcolor, winRect, pixelSize, numbuffers, stereomode, multiSample, imagingMode, specialFlags,
clientRect, fbOverrideRect, vrrParams);
I have also unziped the
PsychtoolboxKernelDriverUpTodDate_Unsigned.kext.zip driver i.e.
sudo unzip /PathToPsychtoolbox/Psychtoolbox/PsychHardware/PsychtoolboxKernelDriverUpTodDate_Unsigned.kext.zip
How can I solve this?