Could you please attach the i915_error_state file which dmesg mentions? It should explain why the hang happens.
It should be available in /sys/kernel/debug/dri/0/i915_error_state.. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/939809 Title: screen turns black while running opengl app To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/939809/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs