Quote Originally Posted by Temüjin View Post
My vote is still for a clean install. It looks like you never fully removed a previous install of the nvidia driver (the one you installed directly without using a .deb).
How can I be more complete than
apt-get --purge remove nvidia-common bbswitch-dkms bumblebee bumblebee-nvidia nvidia-current nvidia-settings && apt-get --purge autoremove
? I also removed the bumblebee repositories and authentication.