linux-kernel - Re: -rc6: annoying thermal messages

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Message-ID: <20091118171225.GF20887@elf.ucw.cz>
Date:	Wed, 18 Nov 2009 18:12:26 +0100
From:	Pavel Machek <pavel@....cz>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: -rc6: annoying thermal messages

On Mon 2009-11-16 10:54:29, Henrique de Moraes Holschuh wrote:
> n Mon, 16 Nov 2009 12:23 +0100, "Pavel Machek" <pavel@....cz> wrote:
> >
> > My dmesg log is rather full of. Thinkpad x60.
> > Pavel
> 
> I think I will have to rate-limit it somehow.  Do we have any ready-to-
> use generic rate-limiters that can do 'once a minute', or should I
> cook my own?
> 
> But your thinkpad needs some sort of hardware loving care, it seems.
> What does "sensors" report (or cat /proc/acpi/ibm/thermal) ?

guest@amd:~/.gnupg$ cat /proc/acpi/ibm/thermal
temperatures:	59 49 -128 60 38 -128 34 -128 48 50 -128 -128 -128 -128 -128 -128

...sensors are not installed. I see THERMAL EMERGENCY in dmesg, but
I'm not sure how long ago it was generated.

> > thinkpad_acpi: THERMAL EMERGENCY: a sensor reports something is
> > extremely hot!
> 
> That is a direct alarm from the firmware, the EC thinks your hardware
> is damaged and about to catch fire.

Well, working sensors report temperatures in 34C (battery) to 68C
range (PCI).

guest@amd:~$ cat /proc/acpi/thermal_zone/THM*/*
<setting not supported>
<polling disabled>
state:                   ok
temperature:             58 C
critical (S5):           127 C
<setting not supported>
<polling disabled>
state:                   ok
temperature:             67 C
critical (S5):           97 C
passive:                 93 C: tc1=5 tc2=4 tsp=600 devices=CPU0 CPU1 
guest@amd:~$ 

> Either that, or something  in the driver is seriously broken. But
> you're the first one to ever report that alarm :)

Well, being only in kernel log, those messages are not exactly easy to
notice.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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