Just do not start lightdm on Ubuntu

sudo update-rc.d -f lightdm remove

WHAT THE F%^&KING F%&&%^CK. THAT'S NOT WORKING.

http://upstart.ubuntu.com/cookbook/#disabling-a-job-from-automatically-starting

echo "manual" >> /etc/init/lightdm.override

Written by Knilluz on 17 October 2012 at 22:16