The best way of upgrading to Ubuntu 16.04 LTS is to make a clean install. But if you have already hit the upgrade button or used the apt-get update command line on your computer with Nvidia Optimus graphics card, chances are that the CPU is turning very hot than usual in some scenarios. I noticed it on my test PC and have been scratching my head since the upgrade plunge. Seems like the CPU is doing all the graphics load. It is definitely a corrupted Nvidia Optimus graphics card drivers. The solution was simple – just install the Nvidia drivers. Note that I’m talking about the Bumblee project Nvidia drivers which are exclusively developed for GNU/Linux Nvidia Optimus technology based devices.
Launch Terminal and type the following commands one at a time:
sudo apt-get install nvidia-319-updates nvidia-settings-319-updates
It’s time to edit the conf settings:
Set the following values by editing: /etc/bumblebee/bumblebee.conf
Driver=nvidia KernelDriver=nvidia-319-updates LibraryPath=/usr/lib/nvidia-319-updates:/usr/lib32/nvidia-319-updates XorgModulePath=/usr/lib/nvidia-319-updates/xorg,/usr/lib/xorg/modules
That’s it. You can now save the conf file. Close everything and reboot the computer. If it is still not fixing the problem, run the following command to switch to Intel:
sudo prime-select intel