Comment 63 for bug 813343

@Christophe and @Radu: I really suggest opening a new, separate bug for this special case with two external monitors, primary one switched off.

@Christophe: is it possible to use your old xorg.conf (11.04) with 11.10 (without nvidia-settings)? Or save the running configuration to an xorg.file with nvidia-settings and use it. Possibly you could post the xorg.conf here?
Working with three monitors like this is new to me, thanks for correction ;)