# dmesg |grep ugen*
ugen0.1: <0x8086 XHCI root HUB> at usbus0
ugen0.2: <Prolific Technology Inc. USB-Serial Controller> at usbus0
ugen0.2: <Prolific Technology Inc. USB-Serial Controller> at usbus0 (disconnected)
ugen0.2: <Prolific Technology Inc. USB-Serial Controller> at usbus0
ugen0.2: <Prolific Technology Inc. USB-Serial Controller> at usbus0 (disconnected)
ugen0.2: <Prolific Technology Inc. USB-Serial Controller> at usbus0