I thought this might be related: I can run "sudo" without any problem, but "su -" is failing.
$ su - Password: su: Autenticazione non riuscita $ sudo uname -r [sudo] password for montblanc: 3.2.0-24-generic-pae -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kdebase-workspace in Ubuntu. https://bugs.launchpad.net/bugs/260744 Title: no login possible after installing kubuntu-desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kdebase-workspace/+bug/260744/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs