I get an error while trying to install the nvidia proprietary driver, which states that:
you appear to be running an XServer.
So I've followed instruction provided here.
But when I enter
sudo service lightdm stop
My screen goes completely blank and I am unable to proceed.
Running Ubuntu 16.04
Linux version 4.4.0-66-generic (buildd@lgw01-28) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)