[Bug 79223] extra vsync when reading back pixels in xbmc

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79223

--- Comment #5 from Michel Dänzer <michel at daenzer.net> ---
(In reply to comment #4)
> I'm also seeing something else waiting for vsync. With glReadPixels() out of
> the picture, and glXSwapIntervalMESA(0), I'm still getting 60 fps and no
> tearing. Possibly related?

Either

 Option "SwapbuffersWait" "off"

and/or

 Option "EnablePageFlip" "off"

should avoid that.

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