I get exactly the same issue as described above. Screen just goes blank (although is responsive i.e. music still plays and can stop with keyboard) and after a forced reboot logs show:
Jul 12 16:15:19 russLaptop kernel: [27811.780077] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung Jul 12 16:15:19 russLaptop kernel: [27811.781636] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -11 (awaiting 11880249 at 11880136, next 11880250) Jul 12 16:15:19 russLaptop kernel: [27811.782272] [drm:init_ring_common] *ERROR* render ring initialization failed ctl 00000000 head 00000000 tail 00000000 start 00000000 Jul 12 16:15:20 russLaptop kernel: [27812.415027] [drm:i915_do_wait_request] *ERROR* something (likely vbetool) disabled interrupts, re-enabling I've now had this several times. -- 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/792698 Title: GPU hung ERROR => nothing is displayed on screen anymore. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/792698/+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
