Ubuntu
ubuntu-drivers-common package

  1. Bug #1310023
  2. Comment #16

Comment 16 for bug 1310023

Revision history for this message
sfc (sfc-0) wrote :

Today I purged bumblebee and installed nvidia-prime again and found the solution.
The key is DO NOT REBOOT after changing video card in nvidia-settings. If you want to reboot right after the change, you MUST LOGOUT AND LOGIN then reboot, or, at least on my laptop, the discrete card will disappear from lspci and cannot be switched.
Purging nvidia-prime and a shutdown will recover the discrete card.

nvidia-prime 0.6.2
Ubuntu 14.04
kernel 3.13-0-24-generic
nvidia-331 331.38-0ubuntu7