Bug 85086

Created attachment 107922 [details]
xrandr output

The only option I had after the error was to reboot.

Created attachment 107925 [details]
Screenshot

Possibly relevant. The on screen output seems to have converted what I
assume is a tab character into a checkerboard pattern.

The first step to solve this would be a way to reproduce the problem. With this you could bisect or test patches and make sure it does not happen again.

In an effort to reduce irrelevant information, you've cut out potentially relevant things. Best to attach unredacted logs...

(a) Is this an optimus setup? If so, can you try booting with nouveau.runpm=0 [this will cause the nvidia card not to auto-suspend when not used]
(b) Please attach a full kernel log, from boot until the errors.

It would appear that the errors are brought on by a channel hang, from which nouveau recovers in a... less-than-graceful fashion. This is, generally, a known "issue" (more like 100 inter-related issues). However perhaps you can update your userspace (specifically mesa), and whatever issue causes the hang has been fixed in 10.3.1. Upgrading the ddx to 1.0.11 wouldn't hurt either.

As Tobias suggested, if you can identify an action that causes the issue, that would be extremely helpful.

Created attachment 107942 [details]
Full boot log (from journalctl -k -b bootid)

It's been doing this for a while, and I'd been advised to try a newer
kernel as there had apparently been a fair amount of nouveau related
improvements. So I tried various -rc kernels and now the final 3.17.0
kernel. It seems (although I don't have enough data to be certain)
that it's improved things slightly in that the crashes seem less
frequent now. But it obviously still crashes.

Reproducing it is simply a matter of waiting. If I leave the machine
overnight, there's a reasonable chance that it'll be crashed when I
get back into work the following morning. In terms of specific
behaviour to trigger the crash, then no, I can't really give any
information other than that I leave the machine basically idle
overnight, running one of the less demanding screensavers from
xscreensaver (cubicgrid).

I don't think it's an optimus setup, but I'm not familiar enough with
the Nvidia product range to say for sure. It's a PCI GeForce card in
a desktop machine.

By upgrading the ddx, I'm assuming you mean the xorg-x11-drv-nouveau
package? I'm already at the latest distribution supplied version (as
I am for mesa), but I guess I could look at compiling it from source
if you think it might help.

(In reply to tethys from comment #5)
> By upgrading the ddx, I'm assuming you mean the xorg-x11-drv-nouveau
> package? I'm already at the latest distribution supplied version (as
> I am for mesa), but I guess I could look at compiling it from source
> if you think it might help.

Right... but it'd be silly to chase bugs already resolved upstream. Distros tend to be cautious with new versions, which makes sense if your starting position is that things work. When things don't work, get the latest :)

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