[Nouveau] [Bug 99400] [nouveau] garbled rendering with glamor on G71

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99400

--- Comment #19 from Ilia Mirkin <imirkin at alum.mit.edu> ---
OH! DUH!

apitrace: warning: glMapBufferRange: MAP_COHERENT_BIT|MAP_WRITE_BIT unsupported
<https://git.io/vV9kM>

Right, so you need to run this with
MESA_EXTENSION_OVERRIDE=-GL_ARB_buffer_storage. Or find some way to force
glamor to disable it. apitrace doesn't like it. I'm sure that's why the
textures are garbage.

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