I fixed mine by:
sudo add-apt-repository ppa:bumblebee/stable
sudo apt-get update
sudo apt-get install bumblebee bumblebee-nvidia linux-headers-generic
Reboot
I fixed mine by:
sudo add-apt-repository ppa:bumblebee/ stable
sudo apt-get update
sudo apt-get install bumblebee bumblebee-nvidia linux-headers- generic
Reboot