The bug was apparent in 13.10, but I do not see it after upgrade to 14.04 (amd64). I do not see dhclient in lsof output but I have not check with ps.
The bad surprise is that /etc/default/halt is ignored in 14.04. (Consequence of systemd inclusion?) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1169614 Title: /etc/init.d/umountroot: "mount: / is busy" due to dhclient is not stopped To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1169614/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs