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

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Message-ID: <20070401163204.GB5762@ucw.cz>
Date:	Sun, 1 Apr 2007 16:32:05 +0000
From:	Pavel Machek <pavel@....cz>
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

Hi!

> > CONFIG_I2C=m
> > CONFIG_I2C_ALGOBIT=m
> > CONFIG_I2C_ALGOPCA=m
> > CONFIG_I2C_I810=m
> > CONFIG_I2C_PIIX4=m
> > CONFIG_SENSORS_DS1337=m
> > CONFIG_SENSORS_DS1374=m
> > CONFIG_SENSORS_EEPROM=m
> > CONFIG_SENSORS_PCF8574=m
> > CONFIG_SENSORS_PCA9539=m
> > CONFIG_SENSORS_PCF8591=m
> > CONFIG_SENSORS_MAX6875=m
> 
> 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?

ACPI is misdesigned, and lm_sensors can't cope with that.

One idea was to add 'big acpi lock' and make lm_sensors take it, too.

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