I have a 2011 MBP with the dead discrete GPU. Right now I'm using the gfxCardStatus workaround to force the MBP to use the integrated GPU. But whenever I have to reboot, it might freeze up to 30 times before it finally lets me login to OS X. So I want to try a different workaround. I've read that you can delete the discrete GPU drivers by going into /System/Library/Extensions and moving/deleting all the AMD* or ATI* files. This will force OS X to use the integrated GPU. Has anyone done this? If so, have you had any problems? I've seen a few people say they did that and then they couldn't play certain video files, couldn't adjust the screen brightness, and their web browser started flashing.