https://bugs.freedesktop.org/show_bug.cgi?id=90363
Bug ID: 90363
Summary: [nv50] HW state is not reset correctly when using a
new GL context
Product: Mesa
Version: git
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/nouveau
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 115622
--> https://bugs.freedesktop.org/attachment.cgi?id=115622&action=edit
Hack
Hardware state is not reset correctly when a process makes use of a new GL
context, after it has used and then destroyed the previous one.
This manifests in a (still uncommitted,
https://www.winehq.org/pipermail/wine-patches/2015-April/138974.html) Wine test
which fails on nv50. Actually commenting out stream_test(), which makes use of
instanced draws with ARB_instanced_arrays, workarounds the issue.
A single process executes both tests, destroying and then recreating a GL
context in between. AFAIU specifically the per-instance enable flags are never
reset on the HW and that breaks the latter test.
I'm attaching a patch which "fixes" the issue for me but it's not the correct
approach.
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