I don't really expect to get an answer, but since I can't find anything at all on the web I figured it can't hurt.
My computer setup is a bit non standard, and I am having a problem with my monitors.
I am running Windows 7 x64, and I have 2 ATI x1650 graphics cards in the system. I do not run them in xfire mode, as I have 4 LCD monitors, so I needed to be able to use all 4 ports across the 2 video cards (xfire just combines processing power in the GPUs and you only get 2 usable ports)
So my issue is that when my screen blacks for whatever reason (could be when you get the UAC prompt, could be when I hit ctrl+alt+delete to lock my workstation, etc..) I lose my primary monitor. It just goes to power save mode. When this happens I am down to 3 LCD screens functioning. If I go into display properties, the monitor that I lost is now marked as disabled. I also can NOT re-enable it. It allows me to, it just has no affect. Or sometimes it will actually re-enable the monitor, however I then lose a different one. Bottom line is once this happens, I can NOT get 4 LCDs working again.
The work around so far is to log off windows. I was originally rebooting, but then I discovered that logging off re-enables all 4 monitors and everything is happy again. However logging off windows every hour or so is not really a solution.
To make matters harder to debug, it doesn't always happen, and there seems to be nothing different between it happening or not happening.
It is hard to say if the issue is the fault of Microsoft or ATI, but I don't really expect to get a solution out of either of them.

