I run Ubuntu 16.04.
After reinstalling drivers for graphics card (nVidia prime) I got the following error while trying to boot:
Error: Driver 'ebridge' is already registered, aborting...
I solved this problem as follows:
When OS is booted, input the commands in terminal
sudo apt-get purge nvidia* sudo apt-get purge nvidia-settings sudo apt-get purge nvidia-prime
Reboot
Boot with new kernel version (4.4.0-23-generic)