My symptom: Game hangs / freezes, and several seconds later the window closes to desktop. If I am running in 'windowed' mode, I also see a 'AMD Driver has stopped responding message'. If I click the MWO tabbed window icon I can sometimes get back in. The duration of this is about 10 seconds.
My guesstimate diagnosis: The video card has been reinitialized by windows 7 by the "Timeout Delay Recovery" service. This is a feature in windows 7 that detects the video card graphics loop has stopped responding, and issues it a pre-empt command. If the GPU does not respond, the video card is reset, and all video memory is forced to reload (You'll notice the entire desktop redraws too)
My solution: I added a TDR delay setting (set to 8) to overwrite the default value in the windows 7 registry, and rebooted the system. This gives the graphics card more time to respond before being reinitialized. Here are instructions to do so (look under method #1 and 'Let me fix it myself'. Make sure you use the 32 or 64-bit instructions depending on which version of Windows7 you have.
http://support.micro...xItMyselfAlways
I have had about 6-7 matches now today without a single freeze. I'm hoping this continues to work, and helps anyone else out experiencing this freeze.
Edited by Glucose, 14 March 2013 - 12:30 PM.