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Date: Mon, 12 Jan 2015 11:54:55 -0500
From: John Baldwin <jhb@FreeBSD.org>
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To: Matthias Apitz <guru@unixarea.de>, freebsd-mobile@freebsd.org
Subject: Re: power off ath0: <Atheros AR946x/AR948x>
References: <20150111080530.GA2035@c720-r276659>
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On 1/11/15 3:05 AM, Matthias Apitz wrote:
> 
> Hello,
> 
> Is there a way to completely power-off the Wifi chip in my Acer C720?
> I tried 'ifconfig ath0 down' which saves around 20 mA. But the LED stays
> on, which let me think it is still someow on-air.

Not yet.  You could try setting the tunable to disable power for PCI
devices without a driver and not include 'ath' in your kernel config.  I
will (soon) commit a new 'devctl' tool to HEAD that would let you do
'devctl suspend ath0' to do this.

-- 
John Baldwin