GTX 750: Displayport not working on Ubuntu Linux 14.10 with driver 346.47

can only use DVI port but not the displayport (or both)

Card-1: Intel Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
Card-2: NVIDIA GM107 [GeForce GTX 750]
Display Server: X.Org 1.16.0 drivers: nvidia,intel
Resolution: 1920x1200@60.0hz, 1280x1024@60.0hz
GLX Renderer: GeForce GTX 750/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 346.47

is it possible to use multiple screens on that device?

Does it mean there is no display with DP display only[no-DVI display connected] ?
Plz reproduce the issue and provide nvidia-bug-report by running nvidia-bug-report.sh as root user.

seems to be an ThinkVision issues - so pls. close this ticket.