On Thu, 2009-04-16 at 17:56 +0100, Barry Scott wrote: > The code you have to prevent tearing will only work without compositing.
Yes, I just verified that if I simply start xcompmgr then I get tearing once again. > What is needed is a change to the compositing app to avoid the tearing. > Which I think you might have exposed the hooks to with the sync to scan line > stuff, so long as that is independent of XV. Actually, I don't think there's anything exposed yet here that the application can get at. So we'll need to think a bit about how to get arbitrary applications to ask for and get tear-free behavior. But yes, the scanline-based waiting will be very useful, so we just need to find a good way to let applications get at this. -Carl
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