[Bug 45329] [RV730]vline setup changes in xf86-video-ati-6.14.3 causes GPU lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=45329

--- Comment #9 from Torsten Kaiser <x11 at ariolc.dyndns.org> 2012-01-31 10:55:48 PST ---
That patch (attachment 56365) seems to work.
The patched xf86-video-ati (6.14.3 + your first debugging patch) did not cause
any GPU lockups with kernel 3.3-rc1 + Jerome's mutex fix for the GPU reset path
+ your DESKTOP_HEIGHT patch.

While I do have a sure way to see if the bug has been triggered (GPU lockup
messages in the syslog), I do not have a reliable way to seen if the trigger
was there but without a lockup. I'm rather sure that it is fixed, but lacking a
reliable way to trigger it, it is impossible to confirm this 100%. I will keep
trying to trigger this and will definitely let you know, if that lockup
returns.


But I think I'm starting to lose the overview about how many interconnected
bugs are in the play.

Bug 1) Kernel causes a GPU lockup on invalid requests -> I think that one
should be fixed by attachment 56365.
Bug 2) Regression(?) in 6.14.2 to 6.14.3 that cause the driver to send these
invalid request. Is attachment 56367 supposed to fix this? Do you want me to
try that patch against vanilla 3.2 to see if there are still GPU lockups
logged?
Bug 3) Regression in 3.2 to 3.3-rc1 with the recursive mutex lock on GPU reset
-> That one has been fixed in mainline with Jerome's patch
Bug 4) Regression in 3.2 to 3.3-rc1 that the X server fails to recover from an
GPU lockup even with Bug 3 fixed -> Do you think that its worth trying to
find/fix this, even if with Bug 1 fixed these lockups can't be triggered
anymore?

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