[Bug 70035] GPU Lockup on AMD RS880 HD4200

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70035

--- Comment #8 from Tasev <tasev.stefanoska at skynet.be> ---
Hello,

I found this thread on the phoronix forums, i don't no but maybe is related .

http://phoronix.com/forums/showthread.php?50038-Updated-and-Optimized-Ubuntu-Free-Graphics-Drivers/page66

comment #652 from berklay 

I was getting the whole wm freeze up immediately after logging into my Openbox
desktops and had to switch console to reinstall the last working debs. There
was nothing in any of the system logfiles and disabling things like conky and
compton (the compositor) didn't resolve anything.

Through trial and error I traced a regression caused by the 'winsys/radeon:
remove cs_queue_empty' commit from Sept 22. Doing a git revert -n
0653c66ef40ac553f91b29bbda7f59f7ce6948fa and recompiling fixed the issue for
me.

I was using the latest 32-bit ubuntu mainline kernel and the freezes happened
on a laptop with a Mobility Radeon HD 4530/4570 and also on a desktop with an
X850 XT. I haven't yet had a chance to see if the desktop machine works with
the above solution, but both machines were previously in sync and went wrong
with the same update (the set that was released on Sept 23).

The bug is reported here https://bugs.freedesktop.org/show_bug.cgi?id=70123

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