This bugs happens continuously with all kernels AFTER linux- image-3.5.0-24-generic (installed automatically by dist-upgrade):
- linux-image-3.5.0-25-generic 3.5.0-25.39 - linux-image-3.5.0-26-generic 3.5.0-26.40 - linux-image-3.5.0-26-generic 3.5.0-26.42 The bug disappears if I reboot the system with linux- image-3.5.0-24-generic (3.5.0-24.37) so I assume it was introduced by some change in linux-image-3.5.0-25-generic. The bug happens in various contexts but is very often triggered by switching firefox to a tab already opened on the url http://girovagandoinmontagna.com/forums/ The symptoms are usually: - system freezes for several seconds then resumes - garbled fonts or missing text in the above firefox page. Other urls seem to display better. - sometimes apport-gtk loops forever while collecting bug information. Sometimes it works. The following messages appear in the kernel log (dmesg): [ 230.894186] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung [ 230.894190] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state [ 230.897745] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off ** Attachment added: "crash report generated by apport" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1145325/+attachment/3572508/+files/xserver-xorg-video-intel.2013-03-13_18%3A23%3A46.102218.crash -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1145325 Title: constant lock wierd signs instead of letter To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1145325/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp