[Bug 94829] X crash when starting minetest with compositing and DRI3 PRIME

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94829

--- Comment #23 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Christoph Haag from comment #22)
> Does not fix the freeze.
> 
> There's also a weird flicker when it happens:
> https://www.youtube.com/watch?v=2lvhILUShTU

That looks like what happens if the screen pixmap is flipped but we lose track.
The flash is probably we did a CRTC modeset (one of the attempts at error
recovery) rather than a flip.

Could I look at a debug Xorg.log when it freezes with the patch? First I want
to verify that the patch prevents the vblank queues from clogging and then see
if we are still hitting a pageflip error. Knowing that should direct the
barking to a different tree.

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