Autologin

Change the following file:

sudo nano /etc/lightdm/lightdm.conf

...
#autologin-guest=false
autologin-user=USERNAME
autologin-user-timeout=0
#autologin-in-background=false
...

I've used following lines to get the same setup (I used SSH but it does not matter)

clean ubilinux install

sudo systemctl disable gdm
sudo apt-get install software-properties-common -y
sudo add-apt-repository ppa:team-xbmc/xbmc-nightly
sudo apt-get update
sudo apt-get install kodi -y
sudo adduser --disabled-password --disabled-login --gecos "" kodi
sudo usermod -a -G cdrom,audio,video,plugdev,users,dialout,dip,input,netdev kodi
sudo nano /etc/init.d/kodi

---

#! /bin/sh

### BEGIN INIT INFO
# Provides: kodi
# Required-Start: $all
# Required-Stop: $all
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts instance of Kodi
# Description: starts instance of Kodi using start-stop-daemon and xinit
### END INIT INFO

############### EDIT ME ##################

# path to xinit exec
DAEMON=/usr/bin/xinit

# startup args
DAEMON_OPTS=" /usr/bin/kodi-standalone -- :0"

# script name
NAME=kodi

# app name
DESC=kodi

# user
RUN_AS=kodi

# Path of the PID file
PID_FILE=/var/run/kodi.pid

############### END EDIT ME ##################

test -x $DAEMON || exit 0

set -e

case "$1" in
start)
echo "Starting $DESC"
start-stop-daemon --start -c $RUN_AS --background --pidfile $PID_FILE --make-pidfile --exec $DAEMON -- $DAEMON_OPTS
;;
stop)
echo "Stopping $DESC"
start-stop-daemon --stop --pidfile $PID_FILE
;;

restart|force-reload)
echo "Restarting $DESC"
start-stop-daemon --stop --pidfile $PID_FILE
sleep 5
start-stop-daemon --start -c $RUN_AS --background --pidfile $PID_FILE --make-pidfile --exec $DAEMON -- $DAEMON_OPTS
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|force-reload}" >&2
exit 1
;;
esac

exit 0

---

sudo chmod a+x /etc/init.d/kodi
sudo dpkg-reconfigure x11-common
"anyone"
sudo /etc/init.d/kodi start
# if no error
sudo update-rc.d kodi defaults
sudo reboot

have fun !!!