I have a hybrid laptop Lenovo T420. I have disabled Optimus in BIOS and I'm only using discrete graphic (Nvidia) now. My Nvidia GFX worked before I upgraded to Ubuntu 13.04, but now the driver wont load.
I tried reinstalling the 'nvidia-current' driver with:
sudo apt-get remove --purge nvidia-* sudo apt-get install nvidia-current nvidia-settings
$ lspci | grep VGA 01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1) $ uname -a Linux laptop 3.8.0-21-generic #32-Ubuntu SMP Tue May 14 22:16:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux $ lsmod | grep -i nvidia $
Any clue on how to move on with this?