Monitor arrangement changes randomly on Mac Pro
I have a new Mac Pro with 2 Dell 2407 monitors. When I first purchased the computer I only had one 5770 graphics card. Initially I ran the monitor with 1 DVI connection and the 2nd monitor connected connected via the mini displayport-to-DVI adapter. Everything worked fine until the first update of 10.8 and everysince 10.8.1 my monitor arrangement has been randomly changing. Sometimes the second display would not even be active.
I could not justify paying $60 for the mini display port adapters for I purchased a second 5770 graphics card and I still have the same issue. Almost every time I reboot I either have a different arrangement setting for both monitors, or only 1 monitor will be active.
I have zapped the PRAM and that did not put an end to the problem. I also did a clean install on another drive just to see if that was a problem and that did not make a difference.
Any help would be greatly appreciated! 🙂