Alright, as per comment #11 it sounds like the original issue is gone (and probably was a kernel drm issue). The user is still experiencing gpu lockups, but this is already covered by bug #553789.
Fwiw, we will need to get better GPU hang tools for -nouveau in place before we can effectively diagnose GPU lockups with that driver. Meanwhile, work directly with upstream or with the Ubuntu kernel team on them (since GPU hangs are almost always due to issues in kernel drm).
Alright, as per comment #11 it sounds like the original issue is gone (and probably was a kernel drm issue). The user is still experiencing gpu lockups, but this is already covered by bug #553789.
Fwiw, we will need to get better GPU hang tools for -nouveau in place before we can effectively diagnose GPU lockups with that driver. Meanwhile, work directly with upstream or with the Ubuntu kernel team on them (since GPU hangs are almost always due to issues in kernel drm).