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Lightdm LightDM is a cross-desktop display manager that aims to be the standard display manager for the X server.


You can install lightdmAUR from the AUR.

Warning: Lightdm changes your $PATH and it might create issues. See [1] for how to fix the $PATH.

Enabling Lightdm

Lightdm can be loaded on startup by entering it in your daemons array in rc.conf, or by appending the following line to inittab:

x:5:respawn:/usr/sbin/lightdm >& /dev/null

If you're using systemd, Lightdm also has a systemd service file, start it with systemctl start lightdm.service or enable it for boot with systemctl enable lightdm.service.

See Display Manager for detailed instructions.


Lightdm will only show a blank screen until a greeter is chosen. Open the The configuration file at


Find the #greeter-session= option, uncomment it, and change it to the greeter of your choice. For example, to use the default gtk3 greeter, change it to this:


Additional greeters are available in the AUR. To see which greeters are installed, look in /usr/share/xgreeters. Do not include the .desktop extension when setting your greeter.

It is possible to test lightdm with the following command:

$ lightdm --test-mode -c /etc/lightdm/lightdm.conf

Note that this requires xorg-server-xephyr to be installed, first.

NumLock ON

Install numlockx.

for lightDM to turn your NumLock On do this:

# gedit /etc/lightdm/lightdm.conf

add the next line at the end:

greeter-setup-script=/usr/bin/numlockx on

Enable Autologin

# gedit /etc/lightdm/lightdm.conf

Change to:

# gedit /etc/pam.d/lightdm-autologin

(create if it doesn't exist) Add:

auth requisite
auth required
auth requisite
auth sufficient uid >= 1000 quiet
auth required
account required
password required
session required
-session optional
session optional revoke
session required
session required