Ubuntu – How to change the LightDM theme/greeter


I downloaded a couple greeters for LightDM, but I have not figured out how to enable them. Is there a way to switch greeter, either by graphical or command-line method?. I do not intend to change display manager, nor the background, but to change the layout and appearance of the login screen through a different "theme" (greeter is the name for LightDm themes). Thanks for your time.

Best Answer

Just edit the greeter-session option in /etc/lightdm/lightdm.conf to the desired greeter.

If you for example want to use the lightdm-gtk-greeter.

Open up '/etc/lightdm/lightdm.conf' with any editor as root. For examplesudo vim /etc/lightdm/lightdm.conf then change the line




If the file does not exist, let it contain


Then all you have to do is make sure that the greeter is installed (e.g. the package lightdm-gtk-greeter) and then restart lightdm.