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SubjectRe: Hardware running hot and without the fan
On 11/03/2011 04:03 AM, Guenter Roeck wrote:
> 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
>> 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]
>> [2]
> 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 ?

That's to track the temperature manually.

> Also, do you get any output from the sensors command on the notebook?
> Thanks, Guenter

Yes. It claims to have 24 temperature sensors.


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