You can work around this problem by running X11 in the parent of the container and performing all your SHM (and similar) operations there. Essentially, coordina

You can work around this problem by running X11 in the parent of the container and performing all your SHM (and similar) operations there. Essentially, coordination of such things needs to happen where the X11 server is running and not inside the container. This is how Gate One's (soon to be released) X11 feature currently works to isolate each user's X11 server. There exists mechanisms to share memory between containers as well but I personally haven't tried them.