light-locker doesn't handle the authentication. This is handled by lightdm.
What happens it this:
light-locker send a lock signal to lightdm.
lightdm spawns a new X server and starts a lightm greeter in it.
lightdm with the greeter as user interface handle the pam authentication.
light-locker doesn't handle the authentication. This is handled by lightdm.
What happens it this:
light-locker send a lock signal to lightdm.
lightdm spawns a new X server and starts a lightm greeter in it.
lightdm with the greeter as user interface handle the pam authentication.