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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>
Cc:        freebsd-acpi@freebsd.org, "Alexandre \"Sunny\" Kovalenko" <gaijin.k@ovi.com>
Subject:   Re: Spurious thermal shutdowns on Dell Studio 1557
Message-ID:  <20100407183846.S35463@sola.nimnet.asn.au>
In-Reply-To: <4BBB2DE1.3090004@chillt.de>
References:  <4BB69279.6060005@chillt.de> <20100403152134.V35463@sola.nimnet.asn.au> <4BB74BC4.9070409@chillt.de> <20100404012906.I35463@sola.nimnet.asn.au> <1270308642.1455.10.camel@RabbitsDen> <4BB764CC.60500@chillt.de>  <1270334546.1455.45.camel@RabbitsDen> <4BB7C937.9050106@chillt.de>  <1270337076.1455.60.camel@RabbitsDen>  <4BB7D71C.7080303@chillt.de> <1270341153.1455.81.camel@RabbitsDen> <4BBB2DE1.3090004@chillt.de>

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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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