Saturday, January 27, 2007

WSXGA+ on an Acer AL2032WA with Xorg and Nvidia drivers

After a recent apt-get dist-upgrade and upgrade of the Nvidia drivers on my Debian Etch machine, I noticed that my screen resolution was reduced to 1024x768 :-(

Having invested a while ago in my lovely Acer AL2032WA flatscreen monitor, I decided it was high time to get the full value out of it. I had previously been running at 1600x1200 after failing to get 1680x1050 (WSXGA+) to work the last time I tried.

A quick look at the xorg logs didn't tell me much, other than the fact that a bunch of modes weren't validating. Restarting x with the -verboselog switch set to 6 gave me more to go on:

Validating Mode "1680x1050":
...
Mode is rejected: Mode (1680 x 1050) is too large for DFP
Native Resolution (Max: 1280 x 1024).

It seems that the Acer gives some wholly inaccurate resolution information. The Nvidia driver howto told me to add the following option to the Monitor section of /etc/X11/xorg.conf:

Option "ModeValidation" "NoDFPNativeResolutionCheck"

On restarting x I was greeted with beautiful 1680x1050 resolution :-) The only minor annoyance is some panning on the login screen, but I can live with that.

6 comments:

laptop battery said...
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Natalia said...

Thanks for writing this.

出張ホスト said...
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家出 said...
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