Watching /var/log/syslog on shell 1, it appears that the following 2 lines occur at least often, i.e. always for the last 4 hangs:
May 25 15:46:40 tango kernel: [22641.579960] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung May 25 15:46:40 tango kernel: [22641.579965] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring In addition I noticed that I always receive the following lines when switching to shell 1 (with and without hangs): May 25 15:46:50 tango kernel: [22651.735258] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id May 25 15:46:50 tango kernel: [22651.735261] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id Maybe this info is of help? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1003889 Title: Graphical hangs on mouse display switch To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1003889/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
