linux-kernel - Re: Hardware running hot and without the fan

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Message-ID: <20111103020301.GA22333@ericsson.com>
Date:	Wed, 2 Nov 2011 19:03:01 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Lars Noodén <lars.nooden@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	lm-sensors@...sensors.org, Henrik Rydberg <rydberg@...omail.se>
Subject: Re: Hardware running hot and without the fan

>From LKML:

On Wed, Nov 02, 2011 at 05:42:39AM -0400, Lars Noodén wrote:
> There seem to be two problems here, one is that the hardware is getting
> WAY too hot, another is that the fan is not turning on when the hardware
> gets too hot.
> 
>   $ uname -a
>   Linux xubuntu 3.1.0-999-generic #201110270406 SMP Thu Oct 27
>   08:07:41 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
> 
> I've reported the problem to Ubuntu
> 	https://bugs.launchpad.net/ubuntu/+source/linux/+bug/881593
> and the suggestion there was to report it upstream.
> 
> On the notebook computer, parts become very hot to the touch while
> running Ubuntu, but the fan does not run even after it gets hot.  When I
> boot back to OS X, the fan kicks in and runs until the computer returns
> to being cool to the touch.  Similar for the desktop, though I must
> follow the temperature with /usr/bin/sensors.
> 
> The notebook is a MacBookPro8,2 and the desktop is a Macmini3,1
> 
> What metrics do I need to collect to help fix the problem?  I've already
> reported the problem to Ubuntu[2] and the recommendation was to try
> reporting upstream.
> 
> Please CC me in the replies.
> /Lars
> 
> [1] http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/
> 
> [2] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/881593

I see
	applesmc: : read arg fail
in the dmesg log. No idea what that means. Maybe the driver maintainer 
or someone else on the lm-sensors mailing list can help.

Not sure I understand your comment about having to follow the output of the
sensors command. Can you clarify ? Also, do you get any output from the sensors
command on the notebook ?

Thanks,
Guenter

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