I recently installed an 11.04 alpha on my laptop. In the Additional Drivers program, it offers me "Experimental 3D support for NVIDIA cards". I went ahead and installed this to see how it works. Seems at the very least good enough. It runs Unity just fine.
What exactly is being installed with the experimental driver? How is it different from the default driver that Ubuntu uses when it detects an Nvidia card?
Best Answer
The driver it is talking about is the nouveau driver, which is FOSS. Typically that driver only does 2D. 3D support is not finished and is still experimental.
http://en.wikipedia.org/wiki/Nouveau_(graphics)
The idea is that this driver will eventually replace the other one, which is by NVidia and not FOSS, ie proprietary.