This is the third time this has happened with my MBP (10.9) in the last week. I close the lid to put it to sleep, carry it to work in my backpack (pretty cold temperatures here in Chicago, not that that should matter), open the lid to wake it from sleep, and within a few seconds it restarts and gives me the grey "your computer restarted because of a problem." I've had this macbook for several years (2009-2010 model, I believe) so I'm hoping it's not dying on me... If I click "report" on the system crash dialog after it restarts, I see the log below. It's all fairly foreign to me but seems like it's some kind of graphics related kernal panic. I bought a new second display last week but again, I don't think that would have anything to do with this crash. Any ideas?