I experienced a permanent GPU lock-up today, the screen was unresponsive for half an hour before I decided to reboot by pressing Alt+SysRq- REISUB. The below is the the relevant section of kern.log before shutting down.
** Attachment added: "drm:i915_hangcheck_hung and following messages in kern.log before permanent lock-up" https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1041790/+attachment/3559922/+files/i915_hangcheck_hung_kern.log -- 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/1041790 Title: [snb] GPU lockup IPEHR: 0x0b160001 IPEHR: 0x0b140001, workaround i915.semaphores=0 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1041790/+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
