Unable to select Nvidia in PRIME Profiles within nvidia-settings

[tuxator]

Release: 14.04

2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
nvidia-331:
  Installed: 331.38-0ubuntu6
  Candidate: 331.38-0ubuntu6
  Version table:
 *** 331.38-0ubuntu6 0
        500 http://de.archive.ubuntu.com/ubuntu/ trusty/restricted amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen
To be able to select Nvidia (Performance Mode) from the nvidia/intel list

4) What happened instead
An empty Alert window appears
No output in terminal

nvidia-settings
** Message: PRIME: Laptop detected
** Message: PRIME: is it supported? yes

I do realize that my bug report is extremly similiar to #1276816 but in my opinion it's a different bug since I'm not getting a trace log or any kind of information. I've one line related to the nvidia driver in general inside my dmesg:
init: Failed to spawn nvidia-persistenced main process: unable to execute: No such file or directory

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alexey (grafonline)]

I have the same problem. Can anybody help?