tore@htpc:~$ cd /etc/lightdm/
tore@htpc:/etc/lightdm$ ls
lightdm.conf  lightdm.conf.d  lightdm-gtk-greeter.conf  lightdm-gtk-greeter-ubuntu.conf  users.conf
tore@htpc:/etc/lightdm$ cat lightdm.conf
[SeatDefaults]
autologin-user=tore
autologin-user-timeout=0
user-session=kodi
greeter-session=lightdm-gtk-greeter
tore@htpc:/etc/lightdm$ cd lightdm.conf.d/
tore@htpc:/etc/lightdm/lightdm.conf.d$ cat 50-tore.conf
[SeatDefaults]
user-session=kodi
tore@htpc:/etc/lightdm/lightdm.conf.d$