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Date: Wed, 15 Apr 2015 08:47:49 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Matthias Apitz <guru@unixarea.de>, freebsd-usb@freebsd.org
Subject: Re: power off 5V on USB port
References: <20150407133014.GA1790@c720-r276659>
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On 04/08/15 07:55, Matthias Apitz wrote:
> btw: the man page usbconfig(8) does not explain what 'power_off' means
> at all;

Submit a patch / PR and I'll fix it. power_off means issuing a USB 
request to clear the port power on the parent HUB, if the USB device or 
HUB supports it.

--HPS