I'm a new Linux user, and I recently installed Ubuntu on my Asus UL30JT. The PC runs quite hot, and I randomly stumbled upon this: http://www.grimsby.us/ubuntu-on-asus-ul30vt/
From what I understand, my Nvidia card is probably still on and using power, and probably also creating excess heat? Anyway, I was not able to use the method presented on that page. I tried installing the linked software, but it ended in an error.
How do I disable my Nvidia card?