linux-kernel - Re: [QUERY] Power consumption on a 2013 MBP

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Message-ID: <20140106211115.GA23421@amd.pavel.ucw.cz>
Date:	Mon, 6 Jan 2014 22:11:15 +0100
From:	Pavel Machek <pavel@....cz>
To:	Ramkumar Ramachandra <artagnon@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [QUERY] Power consumption on a 2013 MBP

On Tue 2013-12-31 15:24:00, Ramkumar Ramachandra wrote:
> Hi,
> 
> On a 2013 Macbook Pro, Linux consumes 21W of power while OS X consumes
> just 9W. I found this very disturbing; Linux more than halves the
> battery life of the device. I checked to see that I wasn't running any
> especially power-hungry applications or drivers (using powertop). I'm
> using just one proprietary driver: the broadcom-wl wireless driver;
> otherwise, I'm running the stock 3.12 kernel from Arch's repositories.
> 
> How do I figure out what is consuming power, and what can I do to help
> minimize consumption?

USB usually does that. Try rmmoding hcd(s). If that does not help, try
removing other modules. Oh and try without that broadcom-wl driver.
									Pavel
-- 
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