Comment 17 for bug 1569357

I had all things done, lightdm installed, removed dotfiles, but didn't work. If I run lightdm as root, it starts and allows me to login.

Only the following command fixes it, which sets the lightdm as the default display manager. But I wanted to used sddm instead, because it works better with my non-functional laptop display.

    sudo dpkg-reconfigure lighdm

and selecting lightdm as the default.