Dell D620 is no longer displaying 1900x1200

[MountainEagle]

Until yesterday, my Dell D620 was running fine. Installed in its dock with an HP w2408h running at 1900x1200. There have been recent changes to the BIOS, but that was to do with Wireless.

Suddenly, it will only offer 1600x1200 or 1900x1440, which the monitor will not accept.

I've updated the Nvidia driver, updated the HP monitor driver, but no luck.

Looked at device manager and it just shows "default monitor".

Any thought much appreciated.

 

[MountainEagle]

Problem fixed. The BIOS was changed from the onboard to the docking station graphics card.