[CentOS] Widescreen monitor won't configure to a wide screen

Sorin Srbu sorin.srbu at gmail.com
Wed Jul 30 16:40:01 UTC 2008

>-----Original Message-----
>From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of
>Sent: Wednesday, July 30, 2008 4:59 PM
>To: CentOS mailing list
>Subject: Re: [CentOS] Widescreen monitor won't configure to a wide screen
>On Wed, Jul 30, 2008 at 3:41 AM, Alfred von Campe <alfred at von-campe.com> wrote:
>> Try letting the nvidia installer generate the xorg.conf file (and then
>> possibly tweak it by hand later).  Or try the following xorg.conf file which
>> works for me an autodetects any type of display I've attached to my CentOS
>> systems, including wide screens:
>> # nvidia-xconfig: X configuration file generated by nvidia-xconfig
>> # nvidia-xconfig:  version 1.0  (buildmeister at builder63)  Mon May 19
>> 00:33:37 PDT 2008
>No change, although I did notice that when I log out (or
><ctl><alt><bs>), the "analog (d-sub)" message appears when the login
>screen takes over and the display goes back to 1680x1050 (the login
>screen), so that wasn't it.
>Something is resetting the video mode to 1280x1024 when GNOME comes up
>- is there any file other than xorg.conf that might cause this?
>Thanks to all so far.

Do you have some setting on your actual monitor-hardware you can tweak? You know 
how most lcd-monitors have auto-settings enabled. Maybe something there is 
ducking with your x-configs?

FWIW, I've seen problems when I've had lcd-monitors connected over a kvm-switch 
and/or monitor-cable extenders. Sometimes the OS just can't correctly identify 
the monitor and the only way to fix it is to connect the montor directly to the 
computer at least once to properly identify it.

Also, do you have a way to connect the monitor to a computer running eg Windows, 
just to see it's CentOS and Gnome that's giving you grief and not the hardware?

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