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I have an HP Pavilion dv6 with an Nvidia GeForce GT 230M running the privative driver version 304.43 and Ubuntu 12.04 LTS x64.

I am able to clone the screen and use "extended desktop". The problem comes out when I try to use another screen (not the laptop's one) and I close its cover. At this time the other screen turns black and when I reopen the laptop's cover again the login screen appears on the external one.

So my question is very simple: Is there a way that allows you to work with an external screen closing your laptop's cover (as its screen has been already disabled via NVIDIA X Server Settings)? It is possible with Windows, so I guess with Ubuntu too :)

P.S. If I maintain the laptop's cover opened it works fine, it's just a matter of space...

Thanks a lot!

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up vote 0 down vote accepted

I finally achieved it some time ago in a very simple way:

Just close your laptop's cover before the OS boots and you are done.

You will be able to disable your laptop's screen and only use your external one.


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I was having similar issues and found/modified a script that handles the detection of the external monitor for me, so I don't have to manually disable the laptop screen... I have the script running in my startup applications. This is specific to my setup, but used the ARandR app to help me determine the specifics for my monitor (

sleep 5
XRANDRexternal="xrandr --output HDMI1 --off --output LVDS1 --off --output DP1 --set audio off --mode 2560x1600 --output VGA1 --off"
XRANDRnoexternal="xrandr --output HDMI1 --off --output LVDS1 --mode 1280x800 --pos 0x0 --rotate normal --output DP1 --off --output VGA1 --off"
if xrandr | grep -q ' connected'
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You should have a look at the power management, and change the options so the computer doesn't hibernate when the screen is closed.

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