[Nouveau] [Bug 87244] [NV94] X hangs, logs show kernel: nouveau E[ PFIFO][0000:01:00.0] still angry after 101 spins, halt followed by an X trace

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87244

--- Comment #5 from Zlatko Calusic <zcalusic at bitsync.net> ---
Ha ha ha, you made me laugh with "hard to confirm a negative" comment, been
there - done that. :) This time I got a bit lucky, because I ran
3.18-rc-something the whole time (fixing some other kernel bugs I reported),
and when 3.18 got released and suddenly become unstable there were only about a
dozen nouveau commits to bisect. It was quite easy to find the faulty one.

Also, I was getting lockups pretty fast, about 6-12 hours after reboot, before
I reverted that commit. And now my system has been rock solid for 2 weeks, so
I'm pretty confident the revert is the right fix.

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