[Bug 34313] RV770 lock-up with OpenGL

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34313

--- Comment #16 from Bob Ham <rah at bash.sh> 2011-05-16 08:07:58 PDT ---
After testing I've discovered that there is no obvious culprit.  Reducing the
number of GL features (texture compression, VBOs, GLSL, etc) used by nexuiz
simply extends the amount of time it takes for the GPU to lock up.  A lockup
will occur even with all optional GL features turned off, it just takes a long
time.  Increasing the number of GL features in use just reduces the time it
takes for the GPU to lock up.

Repeatedly running the simple mesa demos in a cycle will eventually cause the
GPU to lock up.  Unfortunately, not always at the same point.

Disabling writeback using 'radeon.no_wb=1' on the kernel command line does not
stop GPU lockups.  Temperature is not a factor; the GPU has locked up at 48
degrees while at other times running fine at over 58 degrees for long periods. 
There are no such problems while using the proprietary fglrx driver.

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