* The monitor power cords should be plugged directly into grounded wall jacks
* The monitors have DP, DVI, and VGA. What ports are available on the video card?
* If testing using VGA or DVI, are you using the VGA and DVI cables that shipped with the monitors?
* Press the monitor Menu button. The bottom of the screen should state:
Resolution: 1920 x 1200@ 60Hz, Maximum Resolution: 1920 x 1200@ 60Hz
Found the problem it was an app included in your drivers. So on this go around i did not install it. the app is called softOSD. Why do you guys include this if you know it causes issues? Really not happy. Lost a whole day on that.
Just to be precise, softOSD is a passive service used by the Dell PowerNAP utility bundled with the U2412M.
It has nothing to do with Dell Display Manager.