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Old 04-30-2012, 04:04 AM   #1
Registered: Mar 2012
Posts: 55

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connecting a second display


I've recently added to my computer a graphic card I was given in order to have the ability to use a second screen. I think the card is recognised because if I go to System->Administration-> Nvidia X server Settings (with ubuntu 10.04), it shows GPU-0 and GPU-1. The first one is probably the integrated gpu I had been using until now.
This card uses a DMS-59 connector, and I have a DMS-59/2*VGA adapter.
My problem is that the Nvidia X server setting window only finds one display, which it names X screen 0.
When I go to system->preferences->monitor, it says "It appears that your graphics driver does not support the necessary extensions to use this tool. Do you want to use your graphics driver vendor's tool instead?". If I click yes, it brings me to the Nvidia xserver settings window, and if I click no, it also says only one monitor is found (even if I click 'detect').
I double checked that every cable is correctly connected, so I don't understand why ubuntu can't find the second monitor.

What could I do to be able to use my second screen, or else make sure what component is faulty and needs to be changed ?

Old 04-30-2012, 04:30 AM   #2
Registered: Jan 2009
Location: New England
Distribution: Arch Linux
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Here is a link on step by step instructions. In order to trouble shoot I would try each component in a single use mode eliminating the hardware concern. Also I would suggest running nvidia-settings as root so you can save the configuration file. ( sudo bash or su - then nvidia-settings / sudo nvidia-settings )
Old 04-30-2012, 04:51 AM   #3
Registered: Mar 2012
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I had done pretty much all that is in that link, including installing the drivers.
I hadn't done the sudo nvidia-xconfig.
The output was different from the one in that link:

Using X configuration file: "/etc/X11/xorg.conf".

VALIDATION ERROR: Data incomplete in file /etc/X11/xorg.conf.
Undefined Device "(null)" referenced by Screen "Default

Backed up file '/etc/X11/xorg.conf' as '/etc/X11/xorg.conf.backup'
New X configuration file written to '/etc/X11/xorg.conf'
Old 05-01-2012, 04:43 AM   #4
Registered: Jan 2009
Location: New England
Distribution: Arch Linux
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If you post your xorg.conf somebody might be able to find the error.
Old 05-01-2012, 07:07 AM   #5
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What distro/version are you using? What motherboard/video hardware do you have?

If you dont know what hardware yuo have, can you run these commands and then put the outputs into 'code' tags (code tags are found with the tools above the posting area, its the '#' symbol).




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