Comment 6 for bug 1262068

I can confirm that the new nvidia-prime works well here:

:~$ apt-cache policy nvidia-prime
nvidia-prime:
  Installed: 0.5~hybrid0.0.2
  Candidate: 0.5~hybrid0.0.2
  Version table:
 *** 0.5~hybrid0.0.2 0
        400 http://archive.ubuntu.com/ubuntu/ precise-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     0.4.2~hybrid0.0.1 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages