linux-kernel - Re: 2.6.32-rc5: unexpected thermal shutdown?

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Message-ID: <20091103183739.GA3312@elf.ucw.cz>
Date:	Tue, 3 Nov 2009 19:37:39 +0100
From:	Pavel Machek <pavel@....cz>
To:	Frans Pop <elendil@...net.nl>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.32-rc5: unexpected thermal shutdown?

On Tue 2009-11-03 18:25:03, Frans Pop wrote:
> Pavel Machek wrote:
> > I found this in the syslog afterwards.
> > 
> > Nov  3 09:59:14 amd kernel: Critical temperature reached (128 C),
> > shutting down.
> > Nov  3 09:59:14 amd shutdown[17819]: shutting down for system halt 
> > Nov  3 09:59:15 amd init: Switching to runlevel: 0
> 
> Looks like what happened to me earlier this year. See
> http://bugzilla.kernel.org/show_bug.cgi?id=13918.

Will take a look.

> > Now, machine was lying on the bed at that point, so...
> 
> So probably both the fan intake and hot air outlet were blocked, 
> effectively preventing cooling.

Well, no.  outlet was not blocked; parts of intake maybe.

> What hardware is this?

Thinkpad x60.

> What's the output of 'grep . /proc/acpi/thermal_zone/TZ*/*'?
> Any thermal zones in there that don't have a "passive" trip point?

128C means "slightly fake" temperature sensor. It seems that it just
produces 128 in THM0 when temperature exceeds some other limit.

pavel@amd:~$ grep . /proc/acpi/thermal_zone/*/*
/proc/acpi/thermal_zone/THM0/cooling_mode:<setting not supported>
/proc/acpi/thermal_zone/THM0/polling_frequency:<polling disabled>
/proc/acpi/thermal_zone/THM0/state:state:                   ok
/proc/acpi/thermal_zone/THM0/temperature:temperature:             58 C
/proc/acpi/thermal_zone/THM0/trip_points:critical (S5):           127
C
/proc/acpi/thermal_zone/THM1/cooling_mode:<setting not supported>
/proc/acpi/thermal_zone/THM1/polling_frequency:<polling disabled>
/proc/acpi/thermal_zone/THM1/state:state:                   ok
/proc/acpi/thermal_zone/THM1/temperature:temperature:             59 C
/proc/acpi/thermal_zone/THM1/trip_points:critical (S5):           97 C
/proc/acpi/thermal_zone/THM1/trip_points:passive:                 93
C: tc1=5 tc2=4 tsp=600 devices=CPU0 CPU1 
pavel@amd:~$ 

									Pavel

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