Thanks, but in my case the evil was https://launchpad.net/~kubuntu- ppa/+archive/experimental. Mea culpa.
sudo apt-get purge ppa:kubuntu-ppa/experimental leads to an unusable system because of uninstalling "some" essential packages. A sudo apt-get install kubuntu-desktop leads to a working system again. Let's logout. I'll be back soon I hope. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1327527 Title: Unable to set locale after update To manage notifications about this bug go to: https://bugs.launchpad.net/kubuntu-ppa/+bug/1327527/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs