How to restart GDM in UBUNTU

GDM = GNOME Display Manager

You may need to restart GDM if GDM halts or does not want to function anymore.

If a similar problem like this occurs it usually means that only GDM does not function.

If you quickly want to restart GDM press the following key combinations together: Ctrl+Alt+Backspace

To restart GDM via the Terminal session type in the following command: sudo /etc/init.d/gdm restart