How to Install and Change Display Manager On Ubuntu?

The Display Manager is one of the most common GUI views that you see on the Login Screen. Ubuntu and other distros also have different default views. Some display managers like lightdm, and GDM3 are often used in various linux distros. This is the top 5 most recommended display manager based on Slant web:

1. Lightdm
Display manager used by ubuntu version before 18.04 LTS. Display login screen looks simple, but for computers with low specifications, still feels not yet light. The login screen looks simple, but for a low-specification computer, it still feels light.

Install Lightdm:

sudo apt-get install lightdm

Remove:

sudo apt-get remove lightdm

2. GDM (Gnome Display Manager)Display manager that developed by GNOME. Has a minimalist look and simple, and lightweight.

Install GDM3:

sudo apt-get install gdm3

Remove:

sudo apt-get remove gdm3

3. Slim
Slim is rarely updated by the developer, but, this display manager is still a favorite for users who are more concerned with system performance than the GUI display. Slim is one of the very light display manager.

Install Slim:

sudo apt-get install slim

Remove:

sudo apt-get remove slim

4. XDM
Looks like a GUI on an old computer, but XDM is also included in the lightweight display manager category.

Install xdm:

sudo apt-get install xdm

Remove:

sudo apt-get remove xdm

5. SDDM (Simple Desktop Display Manager)
This display manager offers a simple and elegant interface. SDDM is a display manager used in KDE Plasma 5 desktop environment

Install SDDM:

sudo apt-get install sddm

Remove:

sudo apt-get remove slim

How to change the display manager?

If you wan to change the display manager, you can do it with type this command on terminal :

sudo dpkg-reconfigure displaymanagername

example, i wanna change to lightdm, so i type like this:

sudo dpkg-reconfigure lightdm

And the screen will display the image below:

Select the display manager which will be use and please restart your computer.