[visionegg] Re: vertical sync?

Hi, were you able to solve this problem?  I am getting the same warning...


Qian Xie <qian.xie@...> writes:

> 
> Hi all,
> 
> VisionEgg reports the message below when I try to run my program:
> "WARNING: Unable to detect or automatically synchronize buffer swapping with
vertical retrace. May be
> possible by manually adjusting video drivers. (Look for 'Enable Vertical Sync'
or similar.) If buffer
> swapping is not synchronized, frame by frame control will not be possible.
Because of this, you will
> probably get a warning about calculated frames per second different than
specified."
> 
> Here is the info on my video card:
> INFO: OpenGL 3.2.9551 Compatibility Profile Context, ATI Radeon HD 3400
Series, ATI Technologies Inc.
> (PyOpenGL 3.0.1)
> 
> I'm running this on a Windows XP machine with a LCD monitor 1909Wf as the
primary monitor (I'm running it with
> dual screen)
> 
> We are running a program that displays stimulus on the screen for certain
amount of time and then gets the
> reaction time from the participant. Will the error above influence the
accuracy of the results? Does this
> matter on a LCD screen? Is this a hardware issue? How can I fix the error?
> 
> Thank you!
> Xie
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