At the end of an online qualifying i was watching other players with +/- in the garage. The guy i was watching probably hit Escape and was back in the garage. Then the session switched to Race the view switched to my car in the garage and my image froze. I was able to hear the sound from the starting cars and the mouse pointer was there, i could click around, but nothing happened. It seemed like everything was darker than before. The game was still reacting to input, so i could quit the game. When i hit Alt + F4 the game asked if i want to exit.
No Crashdump file was created (probably because i could exit the game) and these are two related log files i found.