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I have a Dell 2007WFP (Analog) external monitor which doesn't get picked up on the Display panel. I'm running a ThinkPad W520 with switchable graphics; the graphics card is a NVIDIA Quadro 2000M. I ran the Additional drivers which didn't detect anything required to install.

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I have the W520 too (with Quadro 1000M) and two external monitor (via docking station) I think you must search for the Nividia Optimus problems.

For a 'quick solution' you can change the display configuration in the BIOS settings (F1) from OPTIMUS to integrated (=intel chip) or the other setting for the Nvidia card (my setting) .

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not sure what you mean by the other setting (my setting)... – zvonul May 10 '12 at 9:34

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