Ok, so the good news is that the issues are gone after an upgrade to 16.04 Beta.
I switched back to version before installing plasma 5.5.4 and then upgraded to 16.04 Beta with sudo ppa-purge ppa:kubuntu-ppa/backports kubuntu-devel-release-upgrade Everthing seems to work so far. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1535763 Title: Graphic problem after updating Plasma and sddm To manage notifications about this bug go to: https://bugs.launchpad.net/kubuntu-ppa/+bug/1535763/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
