xorg.conf resolution issues

[Leslie Satenstein]

I have added other resolutions to the list that system-config-display provided. I don't know how it creates the list, but there were some that were left out.

I would like to know how to define the sweep frequencies that are associated with a resolution.  Is this information coming from the monitor?  

UBUNTU supports some sweep frequencies that are not showing in Fedora's list for the same resolutions. With UBUNTU I can get the screen to full width and height, without overshoot or undershoot. With Fedora, I have to skip that resolution as the two sweep frequency options are under/over  (60 / 85 ).  Frustrating to not know what to search for in google for problem resolution.

--- On Thu, 1/15/09, Chris Tyler <chris at tylers.info> wrote:
From: Chris Tyler <chris at tylers.info>
Subject: Re: xorg.conf resolution issues
To: "Community assistance, encouragement, and advice for using Fedora." <fedora-list at redhat.com>
Date: Thursday, January 15, 2009, 7:15 AM

On Wed, 2009-01-14 at 09:41 -0500, jack wallen wrote:
> 
> Chris,
> 
> Thank you for your reply. I did just add a KVM prior to installing F10. I
> didn't think it would be an issue but I think that might be the
culprit.
> When I get home I'll remove it and see what happens. If that is the
case -
> is there a way around it? Or can I remove it, reconfigure X, and
> re-install the KVM?

We're moving towards having X autoconfigure itself based on what the
hardware says it can do. This works in the most common cases. However,
with a KVM switch between the system and the monitor, it may not be
possible for the video card to get information from the monitor about
the resolutions and scan rates it supports (EDID), so you'll need to
supply that information in an /etc/X11/xorg.conf file -- either by
creating one manually or by using a config tool (system-config-display,
X -configure, nvidia-settings, ...).

-Chris

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