lightdm-autologin-greeter

About lightdm-autologin-greeter

From Debian's package description

Minimal autologin greeter for LightDM that has the same auto-login behaviour as nodm, but being based on LightDM it stays on top of modern display manager requirements.

The difference between LightDM's built-in auto-login and this greeter, are the behaviour in case of 0-seconds autologin delay: when LightDM autologs in with no delay, upon logout it will show the login window again. The intent is that, if the default user logged out, they probably intend to log in again as a different user.

When managing a kiosk-like setups, once the X session quits, the desired behaviour is to just start it again.

LightDM with an auto-login timeout of 1 or more seconds would work as needed, but one sees the login dialog window appear and disappear on screen at each system startup. While it is functional, on a kiosk setup this is aesthetically unprofessional.

With this greeter, the X session starts right away, and is restarted if it quits, without any flicker of a login dialog.

If one is not setting up a kiosk-like setup, it's very likely that the default auto-login behaviour of LightDM is the way to go, and that this greeter is not needed.

From Debian's description of the lightdm-autologin-greeter package, under that package's license.