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I have an external Dell P2412H monitor attached to the HDMI port of my laptop running Ubuntu 12.04.

xrandr reports:

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
1366x768 60.0*+
1360x768 59.8 60.0 
1024x768 60.0 
800x600 60.3 56.2 
640x480 59.9 
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

It looks like the it does not recognise the monitor attached.

This is what xrandr reports when connected via VGA:

Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
1366x768 60.0*+
1360x768 59.8 60.0 
1024x768 60.0 
800x600 60.3 56.2 
640x480 59.9 
VGA1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 531mm x 299mm
1920x1080 60.0*+
1280x1024 75.0 60.0 
1152x864 75.0 
1024x768 75.1 60.0 
800x600 75.0 60.3 
640x480 75.0 60.0 
720x400 70.1 
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

Please any ideas would be useful. Please keep in mind that I'm very new to Ubuntu, so I'd prefer some step-by-step instructions.

share|improve this question
    
Please add the model of your laptop, and the output from the command lshw -c display –  Jorge Suárez de Lis Jan 15 '13 at 11:33
    
Welcome to Ask Ubuntu! The Dell P2412H does not have HDMI connectivity. Please explain how you connected the monitor. Also, do you have any information about whether this works in Windows (in case you're running dual-boot)? –  gertvdijk Jan 15 '13 at 11:33

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