linux-kernel - Re: High pitch noise when ACPI processor module is loaded.

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Message-Id: <201001232112.57601.rjw@sisk.pl>
Date:	Sat, 23 Jan 2010 21:12:57 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	linux-kernel@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: High pitch noise when ACPI processor module is loaded.

Messages about ACPI should be CCed to linux-acpi@...r.kernel.org (added).

On Saturday 23 January 2010, Justin Piszcz wrote:
> Hi,
> 
> Linux:
> When I do not load the ACPI processor module, there is no high pitch 
> noise.  When I load the ACPI processor module (so I can utilize Turbo 
> Boost), Linux makes the system emit a high pitch noise.
> 
> Windows:
> The same system, running Windows 7 does not emit any noise.
> 
> Is there something wrong with the ACPI processor module or its 
> implementation on i5/i7 CPUs?
> 
> Justin.
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