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装了一个Psychtoolbox，Screen正常，但是ScreenTest虽然有闪屏和PTB的欢迎界面，但是最后报错了
这是安好还是没安好啊，求指点！！
>> ScreenTest
***** ScreenTest: Testing Screen 0 *****
PTB-INFO: This is Psychtoolbox-3 for Microsoft Windows, under Matlab 64-Bit (Version 3.0.11 - Build date: Apr 6 2014).
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: Will disable DWM because a regular fullscreen onscreen window is opened -> We want best timing and performance.
PTB-INFO: The detected endline of the vertical blank interval is equal or lower than the startline. This indicates
PTB-INFO: that i couldn*t detect the duration of the vertical blank interval and won*t be able to correct timestamps
PTB-INFO: for it. This will introduce a very small and constant offset (typically << 1 msec). Read *help BeampositionQueries*
PTB-INFO: for how to correct this, should you really require that last few microseconds of precision.
PTB-INFO: Btw. this can also mean that your systems beamposition queries are slightly broken. It may help timing precision to
PTB-INFO: enable the beamposition workaround, as explained in *help ConserveVRAM*, section *kPsychUseBeampositionQueryWorkaround*.
PTB-INFO: OpenGL-Renderer is NVIDIA Corporation :: GeForce 610M/PCIe/SSE2 :: 4.3.0
PTB-INFO: VBL startline = 768 , VBL Endline = 768
PTB-INFO: Measured monitor refresh interval from beamposition = 16.691103 ms [59.912157 Hz].
PTB-INFO: Will use beamposition query for accurate Flip time stamping.
PTB-INFO: Measured monitor refresh interval from VBLsync = 16.679823 ms [59.952675 Hz]. (298 valid samples taken, stddev=0.236648 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 ScreenTest (line 15)
w = Screen(*OpenWindow*,screen);
这是报错的脚本
% ScreenTest
%
% Test hardware/software configuration for performance.
%
% 10/14/06 dhb Wrote stub version.
% Get all screens
screens = Screen(*Screens*);
% Test each screen
for screen = screens
fprintf(*\n***** ScreenTest: Testing Screen %d *****\n*,screen);
% Open window. Prints some diagnostics all on its own.
w = Screen(*OpenWindow*,screen);
% Close window
Screen(*Close*,w);
fprintf(*\n***** ScreenTest: Done With Screen %d *****\n*,screen);
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