Nope. This is Optimus: http://www.nvidia.com/object/optimus_technology.html. Nvidia have said they have no plans to support it under Linux officially which really sucks. I ended up returning a laptop because of it.

IIRC, there's an option to compile optimus support into newer linux kernels. I'm just using a intel HD3000 card so i've not tried it myself. unfortunately, Ubuntu doesn't have the friendliest policy towards custom kernel compilation, so you might have to "break the rules" or look elsewhere.