Upgrade Feisty to Gutsy and Dell 2001FP no longer supports 1600x1200

[Randall J. Parr]

The system was running Feisty and has an nVidia  FX 5700 video card 
attached to a Dell 2001FP monitor via DVI.  The monitor has native 
resolution of 1600x1200.  The video cards supports this via DVI.  
Everything ran fine at 1600x1200 under Feisty using the proprietary 
nVidia drivers.

I upgraded the system to Gutsy (which seemed to go fine) but now I can 
not get the system to operate at 1600x1200.  I have googled until my 
fingers bled.  I found quite a few older items about configuring X to 
treat this monitor as 1600x1200 but none of the suggestions work.  If I 
eliminate any but the desired mode (one suggestions) the X will not come 
up.  If I include any modes except 1600x1200, X falls back to those.

The Xorg.0.log implies the Dell monitor EDID is reporting it does not 
support 1600x1200 and is thus removing that mode and falling back to a 
lesser mode.

This was NOT a problem under Feisty (or Debian), but IS a problem under 
Gutsy.

I am not sure if the Dell 2001FP reports back bad information which 
earlier versions of X (or the nVidia driver) ignored or if the Gutsy 
versions of X and/or nVidia driver are not query/reading the EDID 
information correctly.

Has anyone else hit this problem?

Does anyone know how to tell the nVidia driver to NOT query the monitor 
and just use the information provided in xorg.conf?

Thanks
R.Parr, RHCE, Temporal Arts