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

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Date:	Mon, 25 Jan 2010 04:26:47 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Valdis.Kletnieks@...edu
cc:	linux-kernel@...r.kernel.org
Subject: Re: High pitch noise when ACPI processor module is loaded.

On Mon, 25 Jan 2010, Valdis.Kletnieks@...edu wrote:

> On Sat, 23 Jan 2010 10:48:50 EST, Justin Piszcz said:
>> 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.
>
> Sounds like singing capacitors.
>
> http://lwn.net/Articles/145973/ - and see the last 2 comments.
>
>
>

Hi,

I think something else may be wrong?

I switched my kernel config to 100 HZ and the problem persists.

So the question remains, is it possible to utilize turbo boost (in Linux)
without the high pitch noise from the ACPI processor module?

Again, when the module is not loaded, no matter what HZ, there is no high 
pitch noise.

Justin.

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