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Installing 12.04 on Dell D620 laptop (Nvidia Quadro NVS 110M) in a Dell docking station with Dell 1907FP external monitor. During install the external monitor is used fine but once installed, the 12.04 'Monitor' utility steadfastly refuses to detect anything external and I have to use the laptop screen for everything.

Lots of external monitor questions but I cannot find the golden key to unlock this frustrating behaviour which is a step backwards from 11.04 (using to make this post) which happily detects the Dell monitor.

The external drivers utility reports I am using the latest version of Nvidia graphics drivers and it is activated and in use.

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Are you using nouveau driver? If yes, try install nvidia-current to use the proprietary driver. In most case I found nvidia-current has more reliable support for multiple monitors. – number5 Aug 6 '12 at 0:15

Have you tried activating the monitor through the Nvidia X-Server Settings? I couldn't change the resolution through 'Displays', but once I turned on the monitor through the Nvidia control panel, my external monitor started working.

I am using the Nvidia NVS 3100M with a Lenovo Thinkpad T510.

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