sddm

After restarting my laptop which run Kubuntu 15.04 beta, it got stuck at a black screen with a message: Starting version 219. I tried to reboot it a few times, and it always displayed the same message. Fortunately, I found a solution from this page which fixed the problem. Here’s a recap on how to do it. When you see the above message, hit Ctrl + Alt + F2 Run sudo systemctl enable sddm....