[Nouveau] [Bug 64323] Severe misrendering in Left 4 Dead 2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64323

Ilia Mirkin <imirkin at alum.mit.edu> changed:

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--- Comment #14 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 90011
  --> https://bugs.freedesktop.org/attachment.cgi?id=90011&action=edit
a different workaround

OK, I played around with a lot of different options. It actually turns out that
my last patch leaks fences. And it waits on fence instead of fence_wr. The new
version fixes all these issues.

Sticking in a semaphore acquire instead helped a bit, but the rendering was
still not right. Even if I used screen->fence.current. So wait it must be :(

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