GPU lockup CP stall for more than 10000msec on latest vanilla git

[Andy Furniss]

Markus Trippelsdorf wrote:

>> Does booting with radeon.wb=0 fix the issue?  Please make sure your
>> kernel has this patch:
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=86a1881d08f65a42c17071a59c0088dbe2870246
>
> My kernel has this patch and radeon.wb=0 doesn't help.

I think that should be no_wb=1