On Mon, 26 Jul 2021 10:15:08 +0100 (BST) Mark Hills wrote: > Is there some kind of X event that fvwm can respond to when a new USB > input device is plugged in?
You could check out the silly program I wrote to handle this exact situation. It listens for udev events. https://tomhorsley.com/software/udev-act/udev-act.html