I had the same problem after updates: After
service apparmor teardown I can shutdown the machine. So this is definitely a problem of apparmor. I did: apt-get install --reinstall apparmor And it works now. A file named usr.sbin.libvirtd.dpkg-dist did not exist on the system Greets -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1324393 Title: "Force off" fails with "Permission denied" after upgrading to 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1324393/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs