This looks to be a udev bug. The udev log in the original post contains /dev/input/event* notifications, but these don't have the various IS_INPUT tags set, so X won't look at them. It's possible that these tags get set later, but by then X will have already rejected those devices as not input.
This looks to be a udev bug. The udev log in the original post contains /dev/input/event* notifications, but these don't have the various IS_INPUT tags set, so X won't look at them. It's possible that these tags get set later, but by then X will have already rejected those devices as not input.