I have a 10.10 install on a MacbookPro 5,3. Ubuntu uses quite a lot of power and has a really low battery life. I've already disabled bluetooth and the iSight camera. The Macbook has two different graphics cards.The "big" one is a GeForce 9400M,but I don't have a clue about the "small" one (maybe someone could tell me how to figure out which one it is?). Is there a way to tell ubuntu which one to use? Usually a change to the smaller one save me 2-3 hours of battery on OSX.