I've got the following graphics cards installed in my computer:
$ lspci | grep VGA 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 4770 [RV740] 03:00.0 VGA compatible controller: nVidia Corporation G86 [Quadro NVS 290] (rev a1)
I've also got both the "radeon" and "nouveau" drivers installed. The problem is, only the displays on the ATI card get enabled. I don't see anything in the kernel log about the nvidia card, except for:
[ 0.137806] vgaarb: device added: PCI:0000:03:00.0,decodes=io+mem,owns=none,locks=none
If I add the options to the kernel to disable nouveau, it shows the splash screen on the NVIDIA card but after that there is no display on it.
This same setup works fine in Windows with both the NVIDIA and ATI drivers installed. Any ideas?