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[Bug 755841]


By other OS, I presume you mean the ones that *only* support
pageflipping compositors? Which for the reasons highlighted above work
just fine.

IVB in theory supports vsync'ed writes to the scanout, give or take a
few hundred microseconds in signal latency between the display engine
and the render pipeline. When I get my hands on an IVB, I'll hook up the
required kernel/xf86-video-intel infrastructure and see if the claimed
retrofit of vsync works...

In the meantime, the only answer is take a leaf out of the other OSes
playbook and only use pageflipping.

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  [sandybridge] Graphics tearing when playing video

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