It appears that the new forkproxy does not let to pass the host’s X11 Unix socket to the container.
Specifically,
- Using the profile at https://blog.simos.info/running-x11-software-in-lxd-containers/ (sharing the abstract Unix socket of the X11 socket of the host, to the container).
- When starting the container, the error is
Error: Error occurred when starting proxy device: Error: Failed to listen on @/tmp/.X11-unix/X0: listen unix @/tmp/.X11-unix/X0: bind: permission denied