[Cialug] xorg.conf issues

[Jonathan A. Kollasch]

On Tue, Nov 07, 2006 at 09:31:46AM -0600, Tony Bibbs wrote:
> I have a Compaq n620c laptop.  The LCD can only do 1024x768 while when 
> hooked up to the Gateway VX1100 monitor it can do better than 1280x1024. 
>   This works as one might expect under Windows XP.
> 
> I'm now trying to dual boot Kubuntu and for the life of me I can't get 
> the thing to run under 1280x1024.  The X log gives me something about 
> mode 1280x1024 out of range using both the ATI and Radeon drivers for my 
> ATI Mobility LW 7500.  I'm suspecting that this issue is probably a 
> problem with generally poor support for that particular chipset but I'm 
> hoping one of you can prove me wrong.
> 
> Where should I start troubleshooting?  Do I need to use the mergedFB 
> option somehow?
> 
> --Tony

I was having this issue with a i810e-base Dell OptiPlex GX110
and a Dell UltraScan P991.  Turns out the DDC info the monitor
was passing to X was indicating the maximum resolution I was
getting.

`Option "NoDDC" "true"` in the "Device" section allowed me to
override this, but the image was all pattereny, *sigh*.

You may also have to spec out a HorizSync and/or VertRefresh,
and maybe even a ModeLine/Modes to get what you want.

This, of course totally ignores having two displays and whatnot
however.

	Jonathan Kollasch
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