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lastchancetosee

Member

From: Berlin

Registered: 2009-02-19

Posts: 131

[SOLVED] Dual-Monitor with NVidia: Monitor capabilities not detected

Hi,
I'm trying to connect a Beamer to my Computer. The main monitor is a TFT connected via DVI and the Beamer (BenQ PE77000) is connected via VGA. It's native resolution is 1280x720, however if I try to activate it in nvidia-settings I can only select resolutions up to 1024x768 (The beamer is detected as a generic CRT). How can I tell nvidia-settings the capabilities of my beamer? Or is there another way to configure dual monitors with the nvidia driver?

Last edited by lastchancetosee (2010-04-11 12:10:46)

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pauligrinder

Member

From: Salo, Finland

Registered: 2010-04-05

Posts: 38

Website

Re: [SOLVED] Dual-Monitor with NVidia: Monitor capabilities not detected

I believe you need to add a new mode to your xorg.conf to fix that.

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lastchancetosee

Member

From: Berlin

Registered: 2009-02-19

Posts: 131

Re: [SOLVED] Dual-Monitor with NVidia: Monitor capabilities not detected

Where/How do I enter the modes in TwinView? I think all settings are handled in the device section when using TwinView, since there is no seperate Monitor etc. section in the xorg.conf when using TwinView.

I noticed that you can dump EDID-data via nvidia-settings, so I connected the PE7700 via HDMI to get a dump and then loaded it with

Section "Device"
   ...
   Option "CustomEDID" "CRT-0:/path/to/dump.bin"
EndSection

in xorg.conf, but that didn't change a thing, nvidia-settings still claims to know nothing about the device.

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lastchancetosee

Member

From: Berlin

Registered: 2009-02-19

Posts: 131

Re: [SOLVED] Dual-Monitor with NVidia: Monitor capabilities not detected

Ouch. Pure PEBKAC: If you mistype the name of the EDID-dump to load, you really shouldn't be surprised if it doesn't work . Things work fine now, but thanks for your help.

To summarize, for others with the same problem:

If you have to connect your second monitor via VGA for lack of a second DVI output and the monitors EDID doesn't get processed, then connect it via DVI, fire up

nvidia-settings

and go to the GPU-section, hit "Acquire EDID" in the section corresponding to your current monitor and save the file.

Then edit xorg.conf:

Section "Device"
   ...
   Option "CustomEDID" "CRT-0:/path/to/dump.bin"
EndSection

(Change "CRT-0" to whatever your second, EDID-less monitor is detected as when using two monitors, if necessary)
Reconnect monitor to VGA and restart X. nvidia-settings should now correctly identify the second monitors capabilities. If you have two identical monitors, just dump the EDID from the first one and use that for the second. No switching of connections necessary.

Last edited by lastchancetosee (2010-04-11 12:14:19)

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