I've got the newest kubuntu 13.4 from release site and have the same situation. It's critical bug!! System is unsuable. Also I had two unecpected shut down of my computer during installation. I'm switching back to old 12.x version.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1175251 Title: kubuntu upgrade from 12.10 to 13.04 leaves system unusable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1175251/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs