UPDATE/EDIT: I found the problem, my nVidia drivers were being overridden by my DisplayLink drivers.


I'm having trouble getting shadows to work and menu options for "Shadows on Grass" and "Shadow Filtering" are both grayed out. I've tried setting directly in the oblivion.ini file but it appears to reset itself back to "0" for both options. I'm running on the following, with the latest patches installed for everything:

• Windows 7x64 Ultimate
  
• nVidia GTX 480M
  
• i7 980x, 12GB

Note that I get the "defaulting to medium" message going through the configuration options as the card isn't recognized, and I've tried adjusting the settings to "ultra high" with no avail for the shadowing options (everything else appears to work just fine). The renderer info is showing that I'm being forced to 2.0 shaders using package "2".

Other video settings I'm using: 1920x1200 full screen w/ vsync, AAx8 via nVidia control panel, HDR using shader switch trick to prevent the "black screen" problem (using package "19"). I've also had the same "grayed out" problem on 2 other machines with clean installs, all on Win 7 with comparable specs except with different video cards: GTX 280M, 2xGTX 580.

Any help would be greatly appreciated!