Beer's post-it as a caveat of GPU troubleshooting on Ubuntu (16.04 or later)

beer-gpu-note.md

sudo apt purge nvidia-*
sudo apt autoremove
sudo reboot
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sudo apt remove --purge nvidia*
sudo dpkg --configure -a
sudo reboot
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sudo apt purge nvidia*
# Install Nvidia driver
sudo add-apt-repository ppa:graphics-drivers
sudo apt update
sudo apt insall nvidia-396

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt update

# Latest
sudo apt install -y nvidia-driver-415