Have finally managed to solve that for myself. Have you checked /etc/hosts. With hardy, the initial entry was something like:
127.0.0.1 localhost 127.0.1.1 aaa.bbb.com when it should be 127.0.0.1 localhost 127.0.1.1 aaa.bbb.com <name of machine, e.g. ubuntu> -- [users-admin] Unlock -> "Could not authenticate. An unexpected error has occurred." https://bugs.launchpad.net/bugs/194496 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