Ubuntu – What video driver should I install for Nvidia Corporation G96 [GeForce 9400 GT]

I managed to get compiz to work. i uninstalled nvidia's proprietary driver (nvidia-current). now with nouveau, glxinfo gives decent output and says direct rendering is enabled (turns out its talking about the intel chip). then i go to desktop effects, and when i select extra, it says install nvidia proprietary drivers, i click cancel, the screen blinks but compiz is now enabled

Ubuntuforums solution

First go to console (ALT+F2 then type gnome-terminal). Inside the console type nvidia and press the TAB button. If you have the nvidia drivers correctly install there should appear several nvidia files (Like nvidia-settings, nvidia-xconfig, etc..)

Type nvidia-xconfig so it edits the xorg.conf file with the nvidia configs. Reboot the PC.

If you can not still have special effects then do the following: nvidia-current

1. Install mesa-utils (sudo aptitude install mesa-utils or sudo apt-get install mesa-utils)

2. Type glxinfo | grep "direct rendering". If a NO appears then there is some problem with your nvidia installs. If a YES appears then typing compiz --replace after pressing ALT+F2 should give you the 3D effects.

3. If the NO appeared just try to reinstall the drivers with sudo aptitude reinstall nvidia-current

4. Lastly type dmesg | grep "nvidia" in console to see if there is an output regarding nvidia. Normally the output will say how to fix it.