[Bug 91268] R6xx freezes with kernel 3.17 and up

https://bugs.freedesktop.org/show_bug.cgi?id=91268

--- Comment #9 from Michel Dänzer michel@daenzer.net --- (In reply to Kajzer from comment #8)

I suspect you need one when hang happens,

No, as I said I'm mostly interested in the initialization messages.

I'm trying really hard to make it hang with the patch from Alex but it seems that patch did the trick, there are no more hangs.

That's expected. Alex's patch isn't a fix but just to confirm the problem is really directly related to write-combined CPU mappings.