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

From: Rafael J. Wysocki
Date: Sat Jan 23 2010 - 15:12:24 EST

Messages about ACPI should be CCed to linux-acpi@xxxxxxxxxxxxxxx (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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