Public bug reported: The bug is very reproducible. Had to hard shutdown if HDMI cable is plugged into my TV due to the hang. Unplug cable, boot up, shut down, no hang anymore.
Ubuntu: $ lsb_release -rd Description: Ubuntu 12.04 LTS Release: 12.04 $ cat /proc/version_signature Ubuntu 3.2.0-25.40-generic-pae 3.2.18 Hardware: HP ProBook 4420s ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1019386 Title: Shut down hangs when HDMI cable is plugged in To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1019386/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs