Does it remain black, or does the image reappear after some time? What graphics card are you using, and do you have up to date drivers?
It goes black and it shows my screen again. Then in the top left corner of my screen it says DVI everytime i change it. My graphics card is EVGA GeForce GTX 660 SUPERCLOCKED and my drivers are fine
When does it happen? All the time or at certain occasions? For me, this happens after (almost?) every Zakum Run. It doesn't seem to matter if I've been running my NVIDIA GPU or onboard Intel or whatever it is. The fix is to restart my client and I know many others who does this too.
So if it's showing DVI in the upper right corner, that is due to your graphics adapter cutting out while changing resolutions. The issue at it's core seems to be the fact that the client goes from full screen to windowed or vice versa when changing the auto pot settings, right?