Update December 2019: See updated post Running X11 software in LXD containers  which uses LXD proxy devices and is easier to setup. Update June 2018: See updated post How to easily run graphics-accelerated GUI apps in LXD containers on your Ubuntu desktop  which describes how to use LXD profiles to simplify the creation of containers … Continue reading How to run graphics-accelerated GUI apps in LXD containers on your Ubuntu desktop