Went fullscren in DBO and my screen resolution went to the smallest and my screen went dark

Adjust the brightness / gamma thing in the graphic options... i had that darkness too lol

I'm having this problem too. When I first unchecked "Windowed mode" it changed the resolution and gamma for my entire system. I got it back to normal but now for some reason when I open WoW (in fullscreen) it makes my screen dark (which had never happened until DBO). Anyone know why this is happening?

Press default when you enter fullscreen cause the default gamma that this game uses, not a custom one by you, doesn't apply when you enter fullscreen automatically.

This problem has nothing to do with your computer or screen it is within the game itself! Press "O" to open the options window and go to the graphics section and right at the top below the resolution selections is the Gama setting, adjust from there accordingly to fix the problem.

I had this problem too many moths before, just open the options and set it to default.