Occasionally, my computer (a mid 2014 rMBP) freezes and the only solution is to power it off and restart. I get a message that says a graphics problem was detected. I can tell that it's usually when the graphics cards are switching (often when I'm using Safari, but also occasionally when opening Photoshop, etc.) The only solution I've had is to turn graphics switching off, which sucks for battery life. I'm curious if anyone else is having this issue, or if it's something I should take to the Genius Bar.