I am running Ubuntu 12.04 on a T430s laptop that has a NVIDIA Optimus graphic card (NVS 5200M, 1GB). I tried to download and install the latest nvidia driver from here. After restart, I found out that Ubuntu is running in 2D mode!
I tried to uninstall the nvidia driver using --uninstall switch and also purged all nvidia packages. Still no luck! What should I do? I need the openGL feature of my graphic card.
Edit: The only temporary solution I found right now is to use Bumblebe according to here.