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From: DD on 15 Apr 2010 11:10
Hi all,

I am booting a machine that is standing in a hot environment, and
during the boot sequence, I am getting the message
"Critical temperature reached (63 C). Shutting down."
After which the system obviously shuts down.
I suppose this message is coming from ACPI. My question is however, is
there a way to control at which temperature ACPI shuts down the
system.
Can I control the behavior of ACPI? I think normally the BIOS sets
these values, but in my BIOS I am not able to change these values, so
I am wondering whether or not it is possible to override the BIOS
values, and how.

Hopefully someone is able to help me.
Dirk
From: unruh on 15 Apr 2010 12:01
On 2010-04-15, DD <dirk.debecker(a)gmail.com> wrote:
> Hi all,
>
> I am booting a machine that is standing in a hot environment, and
> during the boot sequence, I am getting the message
> "Critical temperature reached (63 C). Shutting down."

Uh, are you really trying to operate in an environment whose temp is
63C? I would think your computer shutting down is the least of your
worries.
your meachine needs more cooling -- either by moving it to a cooler
place, or increasing the fans (assuming that the outside temp is
actually less than 63C)


> After which the system obviously shuts down.
> I suppose this message is coming from ACPI. My question is however, is
> there a way to control at which temperature ACPI shuts down the
> system.

You think that those messages are just put there to make your life
miserable? The computer becomes pretty unreliable at high temp.


> Can I control the behavior of ACPI? I think normally the BIOS sets
> these values, but in my BIOS I am not able to change these values, so
> I am wondering whether or not it is possible to override the BIOS
> values, and how.
>
> Hopefully someone is able to help me.
> Dirk
From: Robert Heller on 15 Apr 2010 12:24
At Thu, 15 Apr 2010 08:10:53 -0700 (PDT) DD <dirk.debecker(a)gmail.com> wrote:

>
> Hi all,
>
> I am booting a machine that is standing in a hot environment, and

You need to 'fix' this. You need to provide some way to cool the machine.

> during the boot sequence, I am getting the message
> "Critical temperature reached (63 C). Shutting down."
> After which the system obviously shuts down.
> I suppose this message is coming from ACPI. My question is however, is
> there a way to control at which temperature ACPI shuts down the
> system.

Maybe, but that is probably not advisable. You run the risk of letting
the magic smoke escape. Or at least introducing processor and/or memory
errors.

> Can I control the behavior of ACPI? I think normally the BIOS sets
> these values, but in my BIOS I am not able to change these values, so
> I am wondering whether or not it is possible to override the BIOS
> values, and how.

It is doubtful. What you need to do is find some way to properly cool
the system. You can *try* under clocking the CPU. Some processors will
run 'cooler' if clocked at lower speeds.

You may need to get a MIL-spec system, one designed for operating in
more extreme environments.

>
> Hopefully someone is able to help me.
> Dirk
>

--
Robert Heller -- 978-544-6933
Deepwoods Software -- Download the Model Railroad System
http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows
heller(a)deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/

From: Jean-David Beyer on 15 Apr 2010 20:35
DD wrote:
> Hi all,
>
> I am booting a machine that is standing in a hot environment, and
> during the boot sequence, I am getting the message
> "Critical temperature reached (63 C). Shutting down."
> After which the system obviously shuts down.

Has the machine always done this since it was new?

If not, what has changed? Dirty heat sinks? Bad bearings in ventilation
fans? Clogged air filters?

If so, does your machine have enough fans, properly located?

--
.~. Jean-David Beyer Registered Linux User 85642.
/V\ PGP-Key: 9A2FC99A Registered Machine 241939.
/( )\ Shrewsbury, New Jersey http://counter.li.org
^^-^^ 20:30:01 up 16 days, 9:56, 4 users, load average: 4.26, 4.44, 4.52
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