Hello, I also have a Dell Optiplex 990 which had the same problem, Steve Atwell's solution worked thanks.
Also thanks to Paul Handly for explaining were to add Atwell's solution. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/768039 Title: Optiplex 990 fails to reboot/shutdown -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs