linux-kernel - Re: Cut power to a USB port?

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Message-ID: <20070102083258.GA24516@kroah.com>
Date:	Tue, 2 Jan 2007 00:32:58 -0800
From:	Greg KH <greg@...ah.com>
To:	Andrew Barr <andrew.james.barr@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Cut power to a USB port?

On Mon, Jan 01, 2007 at 03:56:25PM -0500, Andrew Barr wrote:
> I have a simple question perhaps someone can help me with here...
> 
> I have one of those simple LED keyboard lamps that get their power from
> the USB port. Is there some way in Linux, using files under /sys I would
> imagine, to cut power to the USB port into which this lamp is plugged? I
> know I would have to manually figure out what port it's plugged into, as
> it is not a "real" USB device...e.g. it just draws power. I would like
> to be able to programmatically switch the lamp on and off.

Search the archives of the linux-usb-devel mailing list for a program
that might do this for you (depending on your hardware.)

good luck,

greg k-h
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