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Date:      Sat, 25 Jan 2014 11:54:20 +0800
From:      Erich Dollansky <erichsfreebsdlist@alogt.com>
To:        "John Levine" <johnl@iecc.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: coretemp0: critical temperature detected, suggest system shutdown
Message-ID:  <20140125115420.3043ad5d@X220.alogt.com>
In-Reply-To: <20140125031536.84872.qmail@joyce.lan>
References:  <20140125101955.1651160f@X220.alogt.com> <20140125031536.84872.qmail@joyce.lan>

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Hi,

On 25 Jan 2014 03:15:36 -0000
"John Levine" <johnl@iecc.com> wrote:

> >the problem is that the temperatures did not change. Only the message
> >appeared. The idle machine is still around 50 to 60 and a loaded
> >machine is still 96, all in Celsius. As I live in the tropics, these
> >temperatures are perfectly normal.
> 
> I expect that the thermocouple that measures the temperature has aged
> and is reporting higher temperatures.  Before assuming that, I would
> check that you don't have dust clogging the vents or otherwise
> impaired airflow.
> 
An example:

hw.acpi.thermal.tz0.temperature: 60.0C

This is perfectly normal under the conditions here and I get these
values since I have this machine.

> Look at the man page for acpi_thermal to change the temperature
> warnings.

The warning level is set to -1. So, there should be no warning. The
temperature level for shutting down is set to 99 degrees. This value is
never reached and the machine also never shuts down.
> 
> My laptop was shutting down from overtemperature until I realized that
> I had placed it next to something that was blocking the fan vent.
> 
I placed the machine the same as it runs for at least 3 months now. As
I have said before, the temperature shown are the same as before. Just
the warning comes up when the machine is loaded.

Erich



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