I recently upgraded from lion to ml. My setup is a Dell xps 420, with 8800gt 512mb, and a 8500gt 256mb card. Running on 4 monitors. In lion I used efi injection and the setup was great. After the upgrade, the 2 monitors on 8800gt is fine. But only one of the monitor on the 8500gt works.
Here is the weird problem. The other monitor on 8500gt shows a black screen. However it only display my cursor and nothing else, as I move the mouse across that monitor. Everything else is black. When I do a screen grab of that monitor, everything else and any windows does show up in it. It's as if that monitor does work. When I boot into the installer, all the monitor works as it should
i felt like such an idiot once i figure this out.
i set one of my monitor to rotate 90 degree. once i change it to regular orientation, everything works. the 90 degree rotation works fine in Lion, but not in ML.
if anyone has any clue on getting that to work it would be awesome.
thanks to those that replied
Edited by 3square, 16 August 2012 - 04:48 AM.