Installing Ubuntu 12.04 with 2 graphic cards

Recently tried I installing Xubuntu 12.04 on one of my machines, but at some point of the installation it crashed. Or it appeared to have crashed. I’ve got 2 graphic cards in that machine, one on-board (ATI), one dedicated (NVidia), and had a hard time figuring out how to get through the install.

It didn’t matter if I set the dedicated or on-board graphics card as the primairy one in the bios. So after a lot of switching around, turning off the on-board graphics and so on I finally figured it out.

I had to use both of the graphic cards, both connecting to my monitors. After completing the installation I plugged both monitors into my dedicated graphics card, and could configure them properly with the nvidia configuration tool.