I was affected by this Bug in oneiric and precise. Kubuntu didn't power off when shutting down. But i found a solution to the problem here http://weits.blogspot.co.at/2012/02/kubuntu-1204-computer-wont-power-off.html.
The Problem is that in /etc/kde4/kdm/kdmrc "HaltCmd=/sbin/halt" replace it with "HaltCmd=/sbin/shutdown -P now" (for good step by step guide follow link) Solved problem for me. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/859075 Title: Oneiric does not shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/859075/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs