I can partly reproduce this from an earlier Virtualbox installation. After update Kubuntu started and plasma-desktop was still installed. kubuntu-desktop was however missing and by installing it a bunch of other packages was reinstalled too. So perhaps the latest plasma removed vital packages.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1571564 Title: Unable to install Kubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1571564/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs