Installed gnome3 desktop and switched to it. The freeze issue has not happened since.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1571036 Title: kubuntu 15.10: screen occasionally freezes when desktop lock is activated To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kded/+bug/1571036/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs