When I press the power button on my UP3214Q monitor (running at 3840x2160 @ 60Hz on an AMD Radeon HD 7990 using Catalyst 13.12), it removes the monitor from the list in Device Manager.
This has the effect of re-arranging my displays, turning two 20" portrait displays to landscape, and moving anything that was on the UP3214Q onto the other two monitors.
As soon as I turn the UP3214Q back on, it re-appears in Device Manager, and the 20" monitors change back to portrait mode. I then have to manually move all my windows back to their correct locations.
Any idea why this would be happening? It's as though turning off the monitor at the button is the equivalent of pulling out the cable from the PC.
Thanks,
Campbell