A temporarily solution to this problem is to first log out, then shutdown the computer within GDM. No more beeps.
-- Annoying beep on shutdown using "System -> Shut down..." https://bugs.launchpad.net/bugs/290204 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
