It appears to be working now. I think it was a problem with ubuntu not detecting my monitor, not a problem with the Openchrome driver.

I followed this thread:

http://ubuntuforums.org/showthread.p...ght=openchrome

They had a similar monitor to mine (I have the dell P990), so I just copied the "Monitor" section into my xorg.conf.

HTML Code:
Section "Monitor"
	Identifier "Monitor0"
	VendorName "dell"
	ModelName "p990"
	HorizSync 30-107
	VertRefresh 48-120
Modeline "1280x1024_85.00"  159.50  1280 1376 1512 1744  1024 1027 1034 1078 -hsync +vsync
EndSection
Now I can set my resolution to as high as 1856x1392 (or as low as 640x480, lol).