[Bug 91800] [bisected] flickering in The Talos Principle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91800

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
(Still waiting to complete a download of TTP)

The usual reason for this is that the composited copy is delayed past the next
vblank and so the assumption that the back buffer is safe to use again is false
(and because the rendering by mesa is split across multiple batches in this
case the compositor samples the back buffer in the middle of the rendering) or
that the rendering just takes too long. The right fix is to be able to pass the
buffer from the game to the compositor and only return it once the compositor
has finished with it, alas that dream remains a long way off.

What's the game setup you are using, or does it simply always happen once
windowed?

And of course there may be other reasons behind the flicker hence downloading a
copy myself to investigate.

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