I play NWN in full screen mode. Occasionally I do Alt-Enter to mid-mode to look at something on the web. All that is fine. The issue I have is when NWN gets minimized (usually by accident) my monitor goes into sleep mode while the pc keeps running. I am stuck with having to push the power plug and rebooting.
I'm running a ATI Radeon HD 5450 video card and the Catalyst driver set updated through May 2012
Running Win 7 Yes, when I accidentally minimize to the taskbar the video goes into sleep mode. or if it's maximized and I accidentally hit the windows start button and it loses focus I'm screwed the same way. It's the only game/program that does this.
I went here and started using the High Performance power level and now when it minimizes the display driver dies but at least the video keeps running after a slight pause. Thus I only need to restart NWN and not the entire PC. I guess that's better.
Also this link will allow you to remove the functionality of the window start key. Which as a caster is nice since it's smack in the middle of the buttons for the quick-bars and when maximized it messes with nwn.