So I finally decided to give plasma-login-manager a quick try. And at first it would not work. I was getting no DM but could drop to TTY and found the following problem whenever PLM tried to start; plasmalogin-helper[1615]: Starting Wayland user session: /usr/share/plasmalogin/scripts/wayland-session /usr/bin/startplasma-login-wayland plasmalogin-helper[1638]: Jumping to VT 1 plasmalogin-helper[1638]: VT mode didn't need to be fixed plasmalogin-helper[1638]: chdir( /usr/var/lib/plasmalogin ) ...