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Re: Problem with KVM switch and Screen Res...

Thnx 1.0E6 Raj, it worked a treat!!!

(I am amazed at the response and accuracy of debian lists;
I must be learning how to suck eggs...)

TA, fcG.

On Thu, 2008-02-28 at 20:07 +0530, Raj Kiran Grandhi wrote:
> Frank Charles Gallacher wrote:
> > Greetings,
> > I am running Debian GNU/Linux ("etch" kernel 2.6.18-6-686) on a PC with
> > an NVIDIA GeForce 6600 GT connected to a COMPAQ S710 Monitor.
> > I have just upgraded to the latest NVIDIA driver, using
> > "nvidia-installer".
> > It works fine, the only problem I having is when I introduce my trusty
> > KVM (Keyboard-Video-Mouse) switch, the thing that lets me swap between 2
> > PCs...
> > 
> > When I boot up with it connected, the Hardware Probe that checks the
> > capability of the Screen defaults back to 640x480, rather than 1280x1024
> > when the Monitor is plugged in directly; consequently I get a little
> > claustraphobic when trying to use it in this fashion...
> > 
> > Running Red Hat Linux 9, I could cheat by installing the OS with the
> > screen connected directly, then introduce the KVM into the loop after
> > the install and boot it up OK; Debian appears to be smarter and checks
> > it at boot time instead...
> > 
> > Is there a way to force the issue, and get X to start in 1280x1024 mode
> > with the KVM switch connected???
> I had the same problem when my computer boots up with the monitor 
> switched off. This problem occurs because the nvidia driver queries the 
> monitor for the modes it can support and disables those modes if the 
> monitor is switched off (or can't be queried because of the KVM switch)
> You can get around this by saving the edid data from the monitor to a 
> file and load the file at X startup instead of querying the monitor 
> every time. Run nvidia-settings, select your monitor and "Acquire EDID". 
> Save the edid to some file. Then under the "Device" section of your 
> /etc/X11/xorg.conf file, add the line:
> Option          "CustomEDID"    "CRT-0:/root/edid.bin"
> assuming your monitor is called CRT-0 and you have saved the edid file 
> at /root/edid.bin
> > 
> > Thanking you, fcG.
> > 
> -- 
> Raj Kiran Grandhi
> --
> At the source of every error which is blamed on the computer, you will 
> find at least two human errors, including the error of blaming it on the 
> computer.

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