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

[Loïc Martin]

Randall J. Parr a écrit :
> 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
> 
> 
First, you can try sudo dpkg-reconfigure xserver-xorg, then chose Medium 
at the end, then 1600x1200 at 60

Or you can try to edit xorg.conf and add "1600x1200 at 60"

If this doesn't work, you can provide your custom EDID file - maybe Dell 
can provide it to you, but I think you've got more chances to find it on 
the net : my Dell laptop has the same problem, and Dell never 
acknowledged this issue - it just seem out of their realm of competence, 
both for Linux or Windows.

You just need to add this line in the Section "Device" of your xorg.conf:

Option "UseDisplayDevice" "DFP-0"
Option "CustomEDID" "DFP-0:/etc/X11/nvnew.raw"

(the second line is the relevant one, the first one is only to explain 
why I've used DFP-0)

There's a thread for my laptop at :
https://bugs.launchpad.net/ubuntu/+source/linux-restricted-modules-2.6.20/+bug/33075

Cheers,
Loïc