Nvidia 346.59 on X server 1.17 + Gnome 3.16 sees only one display (Quadro K1000M)

I have a problem with using external display on Lenovo W530 with Quadro K1000M. The content is being displayed on the external monitor (while internal screen is disabled), but I have no ability to enable internal display. Nvidia settings sees only a single display, the same is true for gnome’s display settings (see attached screenshots).

I have the laptop docked in a docking station (Lenovo Thinkpad Mini Dock Plus Series 3 4338) and an external monitor connected to a DVI port. The drives are installed from Ubuntu packages.

The situation is not occuring, when I switch setting in BIOS to only use discrete card. However I don’t want to do it, because it yields system unstable and it freezes randomly.
nvidia-bug-report.log.gz (275 KB)