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

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Message-ID: <20080812112602.GA2948@elf.ucw.cz>
Date:	Tue, 12 Aug 2008 13:26:03 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Milan Broz <mbroz@...hat.com>
Cc:	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

Hi!
> > On Tue, Aug 12, 2008 at 11:41:35AM +0200, Pavel Machek wrote:
> >>>> Aug  6 11:00:10 amd kernel: ACPI: Critical trip point
> >>>> Aug  6 11:00:10 amd kernel: Critical temperature reached (128 C),
> >>>> shutting down.
> >>>> Aug  6 11:00:10 amd shutdown[24414]: shutting down for system halt
> >>>>
> >>>> ...and machine went down at that point :-(.
> >>> I hope you can easily reproduce it?
> >>>
> >>> So it's new in 2.6.27rc1 and wasn't in 2.6.26? Can you please
> >> Yes, I'm very sure. It makes machine basically unusable.
> > 
> > Does this mean you can easily reproduce it?  
> > Please do a bisect then. 
> > 
> >> Not that one :-(. Thinkpad does not even have fan device: it is
> >> controlled by hardware.
> 
> Hi,
> I see exactly the same on my x60s, but during upgrade to 2.6.26.2.

Are you sure?

> I found that (at least in my case) the problem is, that in
> 2.6.25 the core frequency drop to 1GHz (instead of 1.67GHz) when
> the temperature is above some limit.

Can you verify that 2.6.26 is okay?

> 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 :-(.

> (I had bad reproducer script in bisect and bisect failed, so I'll try it again,
> but anyway, for me the bug is even in 2.6.26 tree. It never happened in 2.6.25.)

Hmmm... that's seriously strange. I definitely don't see it in
2.6.26. Maybe it is config dependend?! (Attaching my 2.6.27-rc2
failing config.)
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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