From owner-freebsd-acpi@FreeBSD.ORG  Wed Apr  7 08:48:19 2010
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Date: Wed, 7 Apr 2010 18:48:08 +1000 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: Bartosz Fabianowski <freebsd@chillt.de>
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Cc: freebsd-acpi@freebsd.org,
	"Alexandre \"Sunny\" Kovalenko" <gaijin.k@ovi.com>
Subject: Re: Spurious thermal shutdowns on Dell Studio 1557
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On Tue, 6 Apr 2010, Bartosz Fabianowski wrote:
 > > I think some of the frequencies, provided by acpi_throttle and TCC are
 > > slowing down your machine without really cooling the CPU.
 > 
 > After a couple of days of testing, I believe this did the trick. I reduced
 > the number of frequencies as per Alexandre's tip. I also swapped _PSV and
 > _CRT for good measure (_PSV is now 85°C and _CRT 95°C).
 > 
 > I just rebuilt OpenOffice.org, using a parallel build that stresses all
 > cores. The machine did not overheat. The highest temperature it reached was
 > 84°C for a few minutes. This is still high but not too high.

A result, good.

 > I will try hoovering the air vents and keep my eye on things. If they stay
 > stable from here, I will not be bothering with Dell support.

Great.  I'd still like to know what your remaining frequencies are, as I 
couldn't correlate your previous full set with the throttling N * 12.5%?

cheers, Ian
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