This looks more like a dbus issue than a network-manager issue, the connection is closed before you reach the dbus errors so i dont see why network-manager would be cause of this issue but would much rather someone with more dbus knowledge to decide.
-- system hangs at shutdown https://bugs.launchpad.net/bugs/138691 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