lightdm isn't going to turn off the system properly
with no systemd-logind around ("for no good reason",
that is); good ol' wdm for installed system and the
similarly ol' autologin just work though.

nodm is not gonna cut it since user PATH is weird
within the session breaking livecd-install by putting
/usr/sbin before /usr/bin while it shouldn't be there
in the first place.