How do I prevent KDM from starting at boot?

Question

I would like to stop kdm from starting when my computer boots up. Is there a way to do that? kdm is my only graphical login program, I do not use gdm or xdm.

Answer 1

Disabling it should be as simple as:

sudo mv /etc/init/kdm.conf{,disabled}

The same should be the true for gdm (which also uses a upstart script in /etc/init/).

If you want to fine-tune it, edit /etc/init/kdm.conf and change its start on declarations. Just comment that entire section out and you'll still be able to run sudo start kdm when you want a graphical display.