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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 ?
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 )