This bug also affects me. I left the computer alone for a while (with gedit, gnome-terminal and gmail open on firefox) and when I came back the screen was black. No way I could get the screen back. I managed to login from another computer via SSH and cut the attached traceback from syslog.
** Attachment added: "Syslog snippet containing stack trace." https://bugs.launchpad.net/ubuntu/+source/linux/+bug/853525/+attachment/2571083/+files/syslog-snipet.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/853525 Title: kernel BUG at /build/buildd/linux-3.0.0/drivers/gpu/drm/i915/i915_gem.c:3336! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/853525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs