Next time this happens, can you switch to a text console by hitting ctrl-alt-F1, log in there, and then run "sudo poweroff" and see if the machine will come down?
If it won't then running "top" might tell you what the machine is stuck on. -- System is stuck in a black screen when it is supposed to shut down https://bugs.launchpad.net/bugs/369760 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
