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Old 04-26-10, 10:38 AM   #2
Stephen Warren
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Join Date: Aug 2005
Posts: 1,327
Default Re: Automatic VDPAU V-sync in TwinView

If you use the overlay-based presentation queue, it will sync-to-vblank on both displays at once.

When using the blit-based presentation queue, it will always sync to a single statically configured display, as set by that environment variable.

The most likely way to get the blit-based presentation queue is to disable the X composite extension. See the VDPAU section of the README for complete details on the selection algorithm.
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