I believe the composite extension is turned off:
Option "Composite" "Disable"
How can I determine what presentation queue I am using? The VDPAU config in MythTV is set to Temporal 1x, but I am not sure if this is the the presentation queue you are talking about.
Originally Posted by Stephen Warren
You are most likely using the blit-based presentation queue (do you have the X composite extension turned on)?
If that's the case, trying the latest 185.18.* beta release should solve the problem for you; sync-to-VBLANK (which prevents tearing) was only recently implemented.