Yes the beaglebone black is currently powered by USB. Unfortunately I am not able to debug the board while it’s not working due to my lack of skill… I don’t know how to do… Maybe I can read dmesg on the bbb for a message stating this nonworking state while it asks for passphrase on the PC for a first step… Yes once it’s booted, freebsd see it as a single hid device, just a hid device