From: Ian Campbell <ijc@hellion.org.uk>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: Valdis.Kletnieks@vt.edu, linux-kernel@vger.kernel.org
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Date: Mon, 25 Jan 2010 10:10:41 +0000
Message-ID: <1264414241.16526.84480.camel@zakaz.uk.xensource.com>
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Subject: Re: High pitch noise when ACPI processor module is loaded.
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On Mon, 2010-01-25 at 04:26 -0500, Justin Piszcz wrote:
> So the question remains, is it possible to utilize turbo boost (in Linux)
> without the high pitch noise from the ACPI processor module?

I have to use the max_cstate=2 option to processor.ko in order to not
have a similar high pitch noise. I suppose you might get away higher
values of max_cstate depending on your hardware. Battery life doesn't
seem to be too adversely impacted.

Ian.

-- 
Ian Campbell
Current Noise: Ephel Duath - Ruins (Deep Blue And Violet)

Hmm...  Which would do a better job at driving physicists crazy?  Travel
faster than light, or a floating-point boolean value?
		-- Michael Mol

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