I have one Geforce GTX 650 and one Geforce GTX 660. Each is connected with one monitor. The screen at the GTX 650 is working. I’m using Ubuntu 12.04 with the kernel 220.127.116.11.
The nvidia-settings saves xorg.conf but it is not read at starting x. I’d like to attach the nvidia-bug-report file if I knew where I can do it.