Radeon lockup on 3.8.5-201.fc18.x86_64

[Michel Dänzer]

On Die, 2013-04-23 at 10:08 -0700, Andy Lutomirski wrote: 
> On Mon, Apr 22, 2013 at 10:55 PM, Michel Dänzer <michel at daenzer.net> wrote:
> > On Mon, 2013-04-22 at 16:19 -0700, Andy Lutomirski wrote:
> >
> >> I'm not convinced there's an actual hang.  40 seconds is a long time,
> >> and I've only ever seen this when clicking something, and when this
> >> happens, the screen goes blank immediately (not after a 40 second
> >> delay).
> >
> > Hmm, now that you mention this, I notice in your original report it
> > claims that the CP stalled for 'more than 5102593msec', which is clearly
> > bogus. Looks like something's wrong with the lockup detection.
> > Did this start after a kernel update or something like that?
> 
> It's recent.  It may have been when F18 switched from 3.7 to 3.8.

Can you reproduce it with an upstream kernel? Can you bisect? I realize
it'll probably take a long time, but unless someone has an idea which
change might have introduced the problem...


> I think there are bugs in the lockup detection and in the lockup
> recovery.  Firefox, in particular, is *really* slow afterwards.  Are
> interrupts possibly getting dropped or misconfigured during the reset?

Let's not get ahead of ourselves and focus on the lockup detection issue
for now.


-- 
Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer