Remove bumblebee and use nvidia-prime to switch between the two graphics solutions instead.
First identify your NVIDIA graphics hardware - open a terminal and execute:
lspci -k | grep -EA2 'VGA|3D'
Search for available drivers on the NVIDIA Drivers website.
Update :
Uninstall every NVIDIA related software ...
When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0
parameter to the end of the linux line ... Then press F10 to boot.
When the login screen appears press Ctrl+Alt+F1.
Enter user name and password - then execute :
sudo apt-get purge nvidia* bumblebee
sudo reboot
Update :
Install the latest stable NVIDIA drivers ...
When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0
parameter to the end of the linux line ... Then press F10 to boot.
When the login screen appears press Ctrl+Alt+F1.
Enter user name and password - then execute :
sudo apt-get update
sudo apt-get install nvidia-352 nvidia-prime
sudo reboot
Use the NVIDIA X Server Settings application (Prime Profiles) to switch between the two GPU's.