[Bug 16295] radeon conflict/interference with rt2800pci

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=16295





--- Comment #3 from Rafał Miłecki <zajec5@gmail.com>  2010-06-28 14:14:44 ---
I'm getting confused. Now I get GPU lockups even without loading any WiFi
driver :| It happens frequently with KDE4's effects enabled, not so often with
effects disabled (but still).

It was really annoying to get lockup even every few seconds, so I decided to
try removing "radeon_gpu_reset" from lockup handling. Now I get warnings in
dmesg, but GPU continues to work (even without restarting).

However it's far from perfect solution.

Any idea how can I fix/debug that lockups?

--- Comment #4 from Rafał Miłecki <zajec5@gmail.com>  2010-07-02 20:51:17 ---
(In reply to comment #3)
> I'm getting confused. Now I get GPU lockups even without loading any WiFi
> driver :| It happens frequently with KDE4's effects enabled, not so often with
> effects disabled (but still).
> 
> It was really annoying to get lockup even every few seconds, so I decided to
> try removing "radeon_gpu_reset" from lockup handling. Now I get warnings in
> dmesg, but GPU continues to work (even without restarting).

I got that problems when using my debugging patch created for bug
https://bugs.freedesktop.org/show_bug.cgi?id=28745

After removing it and recompiling I get previous problem. No more GPU lockups
while normal work. Unfortunately I was silly enough to do not save my debugging
patch. This could be some timing issue my patch exposed and I can not reproduce
it anymore :|

Anyway problem with stability after removing rt2800pci is still present. This
doesn't happen with rt2860sta however. Unfortunately differences between that
two drivers are too big to make is debuggable by comparison :|

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