I need OpenGL for some programs, but OpenGL is not being used although installed, as is the Nvidia driver. As I understand it, the Asus Eee PC 1215N has an Nvidia ION2 GPU and an Intel graphics unit. On Ubuntu 11.04, the current Nvidia driver is installed, but not used. When I run nvidia-xconfig it creates an xorg.conf file, but X does not start with that.
How do I get OpenGL support running? Is there a way to use the Intel card, or does only the Nvidia support 3D?
If only the Nvidia ION2 supports 3D, how do I get a working xorg.conf for the Nvidia GPU?
UPDATE (2nd January 2012): I have now found that installing Ironhide works for me on the Asus Eee PC 1215n. There are several questions where Ironhide, and its predecessor Bumblebee, are discussed, but most were outdated.
The Linux Hybrid Graphics project has been moving very fast, changing names, features, web addresses and setup. It took me a few hours to figure out what was what. Anyway, the good news is, you can install Ironhide with the Ubuntu Software Center. Ironhide provides a GUI in which you can choose a profile for your device. I had to reboot before everything worked properly. You can also switch between Nvidia and Intel GPU with a console script provided by Ironhide.
Once setup correctly, graphics acceleration works and battery duration increases significantly, e.g. over 5:00 hrs, instead of 3:40 hrs, with Wifi on!