I have a Lenovo W520 with an I7 2720QM+Nvidia Quadro 2000M.
Now, I always use the system in integrated graphics mode, but I've found that with this setup, the system doesn't detect external monitors attached via the VGA socket - it does detect them using discrete graphics.
Is there something I can do? What if use a WDMI cable? Would the drivers at http://intellinuxgraphics.org/2011Q3.html solve this problem (assuming I update to Oneric)?