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I'm trying to connect 2 VGA monitors to my computer. My graphic card is an Nvidia Geforce GTX660 and I'm working with Ubuntu 12.04.

I have one connector DVI-I to VGA and one DVI-D to VGA to connect the 2 monitors to the DVI ports of my graphics card. In the Nvidia X Server settings I can see that both monitors are enabled. But one of them is not running. Both monitors are running ok when plugged solely to the DVI-I connection of the graphics card. The monitors have different resolution, 1600x900 and 1280x1024 but the second one is the one that is not running (this is connected to the DVI-D port)

With xrandr however I get this:

xrandr
Screen 0: minimum 8 x 8, current 1600 x 900, maximum 16384 x 16384
DVI-I-0 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 443mm x 249mm
   1600x900       60.0*+
   1280x800       59.8  
   1280x720       60.0  
   1024x768       75.0     60.0  
   800x600        75.0     60.3  
   640x480        75.0     59.9  
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)

I know it can be drivers or even hardware related but I would like to get a clue on how to investigate this further from ubuntu.

Thanks in advance

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