I got a desperate workaround, it's in this link: (http://hardc0l2e.wordpress.com/2011/06/30/ubuntu-11-04-shutdown-and- restart-problem-with-cifs/). It works, but not the best way to deal with this bug.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/211631 Title: Network is brought down before network filesystems are unmounted (CIFS timeout at shutdown) To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/211631/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs