linux-kernel - Re: 2.6.21-rc5: Thinkpad X60 gets critical thermal shutdowns

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Message-ID: <20070401145317.GA17776@srcf.ucam.org>
Date:	Sun, 1 Apr 2007 15:53:18 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Alexey Starikovskiy <aystarik@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: 2.6.21-rc5: Thinkpad X60 gets critical thermal shutdowns

On Sat, Mar 31, 2007 at 11:28:46PM -0700, Jeremy Fitzhardinge wrote:

> That seems to have helped.  If I watch
> /proc/acpi/thermal_zone/THM?/temperature, it seems stable even under
> load.   I didn't try watching the thermal_zones when these options were
> enabled, but I presume the temperature was not controlled for it to hit
> 128 degC.
> 
> What's going on here?  Does reading an i2c sensor from the kernel
> prevent something else from doing it?

The i2c drivers access the same hardware as the ACPI methods, and 
there's no locking.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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