this is a more complete command to install stock hwe stack on 16.04
sudo apt install --install-recommends xserver-xorg xserver-xorg-core xserver-xorg-video-all xserver-xorg-input-all xserver-xorg-video-intel xserver-xorg-video-qxl
this is a more complete command to install stock hwe stack on 16.04
sudo apt install --install- recommends xserver-xorg xserver-xorg-core xserver- xorg-video- all xserver- xorg-input- all xserver- xorg-video- intel xserver- xorg-video- qxl