linux-kernel - Re: 2.6.27-rc1: critical thermal shutdown on thinkpad x60

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Message-ID: <20080813202801.GC8861@elf.ucw.cz>
Date:	Wed, 13 Aug 2008 22:28:01 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	Milan Broz <mbroz@...hat.com>, Andi Kleen <andi@...stfloor.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	ACPI mailing list <linux-acpi@...r.kernel.org>
Subject: Re: 2.6.27-rc1: critical thermal shutdown on thinkpad x60

On Wed 2008-08-13 17:13:59, Henrique de Moraes Holschuh wrote:
> On Tue, 12 Aug 2008, Pavel Machek wrote:
> > > Now, the CPU cores remains on 1.67GHz and fan is unable to cool them properly
> > > under heavy load (even if I set "level disengaged" through thinkpad fan control,
> > > temperature sensor shows after a while 128 C (probably not real temp,
> > > I expect some critical flag => and it properly switch off the
> > > system...)
> > 
> > How do you control fans? I could not get anything but -EINVAL from IBM
> > ACPI driver :-(.
> 
> thinkpad-acpi will regard 128 and -128 as invalid sensors, because that's
> how they are used in some BIOSes (and ECs).  We used to bother only with
> -128, but Lenovo did something wierd in one of the EC firmwares and I had to
> add +128 too.  That masks the "help, I am melting" reading.

It was simpler than that. I did not pass "fan_control=1" option.

(Actually... I do not think that option is needed. If fan control is
known to work, it should be just enabled...)
									Pavel

-- 
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