​Josh, Thanks for your response.
Here's the thing... the udev rule is triggering, and systemd is running the /lib/udev/usb_modeswitch program, which ends up running usb_modeswitch_dispatcher. All is good there, but the problem (I think) is as follows: The working udev rule: * Triggered when the USB device is attached * Ends up executing /lib/udev/usb_modeswitch '/2-1' The non-working catch-all udev rule: * Triggered when the USB device **interface** is attached * Ends up executing /lib/udev/usb_modeswitch '2-1/2-1:1.0' I don't understand the inner-workings of the usb_modeswitch_dispatcher, but why does one rule work and not the other?
