RE: ACPI Thermal Shutdown on Boot

RE: ACPI Thermal Shutdown on Boot

[Yu, Luming]

> I'm trying to install kernel 2.6.2. However, as soon  as the 
> kernel starts 
> init, I get a message along the lines of "Critical 
> Temperature reached - 57C, 
> shutting down" and init switches to runlevel 0.

-57C is an obvious error. Maybe there are something wrong with _TMP.

--Luming


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Re: RE: ACPI Thermal Shutdown on Boot

[Chris Jensen]

On Wed, 11 Feb 2004 02:51 pm, Yu, Luming wrote:
> > I'm trying to install kernel 2.6.2. However, as soon  as the
> > kernel starts
> > init, I get a message along the lines of "Critical
> > Temperature reached - 57C,
> > shutting down" and init switches to runlevel 0.
>
> -57C is an obvious error. Maybe there are something wrong with _TMP.

Sorry, that's not -57, that was me guessing badly at the format of the message 
that blinked up before my system powered off. The temperature cited was
(+)57C.
I still think this reading was in error since the BIOS thought it was 67C

However my main problem is adjusting the threshold value so that my system 
won't shut down on boot, can anyone help with that aspect?



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RE: ACPI Thermal Shutdown on Boot

[Nate Lawson]

On Wed, 11 Feb 2004, Yu, Luming wrote:
> > I'm trying to install kernel 2.6.2. However, as soon  as the
> > kernel starts
> > init, I get a message along the lines of "Critical
> > Temperature reached - 57C,
> > shutting down" and init switches to runlevel 0.
>
> -57C is an obvious error. Maybe there are something wrong with _TMP.

I think he just meant 57C.  In any case, we decided to set the _TMP poll
interval to 10 seconds.  After 2 readings above _CRT/_HOT, userland
receives an event and a message is logged saying the temperature is too
high.  On the 3rd one, we shutdown/power off the system.  I think Linux
chose something similar or at least I saw patches for that.

But 57C (or even 67C) is pretty low for _CRT.  We should probably add an
override.

-Nate


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Re: ACPI Thermal Shutdown on Boot

[Karol Kozimor]

Thus wrote Nate Lawson:
> I think he just meant 57C.  In any case, we decided to set the _TMP poll
> interval to 10 seconds.  After 2 readings above _CRT/_HOT, userland
> receives an event and a message is logged saying the temperature is too
> high.  On the 3rd one, we shutdown/power off the system.  I think Linux

If I understand you correctly, 30 seconds is certainly enough time to burn
a CPU when the fan has failed, isn't it?
Best regards,

-- 
Karol 'sziwan' Kozimor
sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org


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Re: RE: ACPI Thermal Shutdown on Boot

[Chris Jensen]

> I think he just meant 57C.  In any case, we decided to set the _TMP poll
> interval to 10 seconds.
... (snip)
>  On the 3rd one, we shutdown/power off the system.  I think Linux
> chose something similar or at least I saw patches for that.

Wouldn't that mean that it would be 30 seconds before the shutdown occurs?
My kernel boot only takes about 8 seconds to launch init, which is when the 
shutdown occurs.



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Re: ACPI Thermal Shutdown on Boot

[Nate Lawson]

On Wed, 11 Feb 2004, Karol Kozimor wrote:
> Thus wrote Nate Lawson:
> > I think he just meant 57C.  In any case, we decided to set the _TMP poll
> > interval to 10 seconds.  After 2 readings above _CRT/_HOT, userland
> > receives an event and a message is logged saying the temperature is too
> > high.  On the 3rd one, we shutdown/power off the system.  I think Linux
>
> If I understand you correctly, 30 seconds is certainly enough time to burn
> a CPU when the fan has failed, isn't it?

Our old default poll interval was 30 seconds so this doesn't change
anything.  I know DeadRat takes more than 30 seconds from "shutdown -h
now" to power off.  All modern CPUs have a thermal shutdown builtin.
Think of _CRT as more of "system temp too high, shut down as soon as you
can."

-Nate


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