linux-kernel - Re: 2.6.26: thinkpad x60 is cooled passively

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Message-ID: <20080813152431.GD8232@mit.edu>
Date:	Wed, 13 Aug 2008 11:24:31 -0400
From:	Theodore Tso <tytso@....edu>
To:	Pavel Machek <pavel@...e.cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.26: thinkpad x60 is cooled passively

On Wed, Aug 13, 2008 at 10:06:18AM +0200, Pavel Machek wrote:
> While verifying that -rc2 regression is gone, I noticed alarming
> stuff:
> 
> 1) thinkpad x60 relies on passive cooling. You have nice 1.8GHz cpu,
> which goes away as soon as you load it.
> 
> 2) after some time it decides that 100% cpu in 1.0GHz is fine for you,
> and it takes quite long to recover.

There is no fan in the X60?  I didn't think that was the case.  I do
know the fans have a tendency to go bad within 12-18 months, and so
the CPU heat sink and fan unit needs to be replaced perdiocially.
What does /proc/acpi/ibm/fan report? 

Or are you saying that the fan isn't keeping keeping up with the heat
output of the CPU?  Are you sure this isn't due to a hardware problem?
As mentioned previously on this list, Lenovo has had a relatively bad
track record with fan failures and with incompetent installation of
the heat sink with bad applications of the thermal compound; it's the
one failings of an otherwise very nice laptop design.

    	     	   	     	       	      - Ted
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