vertical sync?

[Qian Xie]

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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[Gary Lupyan]

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

Post by Qian Xie
Hi all,
"WARNING: Unable to detect or automatically synchronize buffer swapping with

vertical retrace. May be

Post by Qian Xie
possible by manually adjusting video drivers. (Look for 'Enable Vertical Sync'

or similar.) If buffer

Post by Qian Xie
swapping is not synchronized, frame by frame control will not be possible.

Because of this, you will

Post by Qian Xie
probably get a warning about calculated frames per second different than

specified."

Post by Qian Xie
INFO: OpenGL 3.2.9551 Compatibility Profile Context, ATI Radeon HD 3400

Series, ATI Technologies Inc.

Post by Qian Xie
(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

Post by Qian Xie
dual screen)
We are running a program that displays stimulus on the screen for certain

amount of time and then gets the

Post by Qian Xie
reaction time from the participant. Will the error above influence the

accuracy of the results? Does this

Post by Qian Xie
matter on a LCD screen? Is this a hardware issue? How can I fix the error?
Thank you!
Xie
======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html

======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html