On Die, 2013-04-23 at 10:08 -0700, Andy Lutomirski wrote:
On Mon, Apr 22, 2013 at 10:55 PM, Michel Dänzer michel@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.