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Old 02-26-07, 12:11 PM   #1
downey
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Join Date: Feb 2007
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Default Sync to Vertical Blank aborts in TwinView setup

I have setup TwinView using two Samsung 205BW monitors with my 8800GTX and everything works fine as long as I don't enable vertical synch.

Here are my tests with glxgears:

No __GL_SYNC_TO_BLANK:
114939 frames in 5.0 seconds = 22987.681 FPS
119124 frames in 5.0 seconds = 23824.795 FPS

__GL_SYNC_TO_BLANK=1:
Aborted

I have found that if I turn off TwinView and only have one monitor working then everything works correctly, and glxgears reports ~60FPS. So the problem is something to do with TwinView. I have also tried setting __GL_SYNC_DISPLAY_DEVICE=DFP-0 but that didn't seem to make a difference. I have also tried it with and without the composite extension enabled.

Has anyone run into this problem? Or been able to use __GL_SYNC_TO_VBLANK under TwinView? Any help would be appreciated.

Thanks.

Attached my bug-report.log
Attached Files
File Type: log nvidia-bug-report.log (69.6 KB, 104 views)
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Old 02-26-07, 12:37 PM   #2
AaronP
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Default Re: Sync to Vertical Blank aborts in TwinView setup

Hi downey,
This problem should be resolved in the next release.
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Old 02-26-07, 01:11 PM   #3
downey
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Default Re: Sync to Vertical Blank aborts in TwinView setup

Great, thanks.
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