For the people like me who have trouble finding how to switch to lightdm: sudo dpkg-reconfigure lightdm
but also remember to: sudo systemctl enable lightdm.service You also might have to install lightdm before either of these if you didn't have it installed previously: sudo apt install lightdm Afterwards, reboot. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to sddm in Ubuntu. https://bugs.launchpad.net/bugs/1569357 Title: Ubuntu 16.04 - Unity desktop session broken when using non-LightDM as X Display Manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxdm/+bug/1569357/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs