Random MBP Freezes
I have been have quite a few random freezes on my 2011 MacBook Pro lately. This is after my upgrade to Lion. I dual boot with Windows 7 under bootcamp and I’ve noticed that the freeze occurs on restarts, whether from W7 or the Mac side. A scramble through the Apple Forums and the Apple – Stack Exchange, I’ve come upon this solution that works for me at the moment.
Head over to your System Preferences and then to Energy Saver and disable the Automatic Graphics Switching.
This seems to have solved the issue so far. Hopefully Apple releases an update to fix this soon.