I have a pre 12.04LTS Kubuntu system I've upgrade to 12.04LTS and now to 14.04LTS. I remember the unable to logout, shutdown etc from 12.04 and the solution that worked then and now for me on 14.04LTS was:
sudo apt-get install --reinstall polkit-kde-1 and then reboot. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1295521 Title: Installing i386 and amd64 PAM stacks causes shutdown/logout/etc. to break To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1295521/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
