Monitor Wont Power Save Mode

I've had issues in the past where I come to my computer after the monitor goes into power save mode and it won't turn back on. Knowing that my machine is locked I can just press CTRL-ALT-DEL, type my password to unlock it, and once it's unlocked the screen turns on. I can also use VNC to remote to my desktop and unlock it. The monitor does *not* turn on until after unlocking and re-opening the desktop. This didn't happen all the time, but fairly often, particularly when coming in in the morning. In the past I'd thought it was maybe due to UltraMon software that I'd installed to have different backgrounds on each of my monitors, but that has since been uninstalled.

This is becoming more of an issue now that we're pushing out power profiles to all of our machines however. Screens turn off after 5-10 minutes, so frequently when I come back to my desk I'll have this issue. I have a workaround, but I just received a report of another user having the same problem (though he's using XP Professional). I figured I'd try to resolve my issue first (since I have direct access to my PC; he's a remote user), then see if my fix takes care of his problem as well. I am running Vista Ultimate SP1 on a Dell Optiplex 745. The video card (Radeon X1300PRO) has a dual-head DVI cable connected to it running two Dell 1703FPs monitors.