SDDM is a modern display manager for X11 aiming to be fast, simple and beautiful. It uses modern technologies like QtQuick to create smooth, animated user interfaces.
However, my SDDM login screen always stuck with the original user created when the system was first installed -- the left and right arrow that is supposed to change the login user doesn't work for me.
This is LUbuntu 18.04.02.
Any help? Thx.