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

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Message-ID: <20080813205519.GF8861@elf.ucw.cz>
Date:	Wed, 13 Aug 2008 22:55:19 +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

> > > 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...)
> 
> I require explicit user permission to activate knobs that are that
> dangerous, and actively frowned upon by the manufacturer.

Well, it is not more dangerous than 2.6.26.2 (will overheat your
thinkpad, causing critical shutdown). Plus, acpi fans are
controllable/overridable by default from /proc, and 'echo "level 7" >
fan' is not something you can do accidentally...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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