High pitch noise when ACPI processor module is loaded.

From: Justin Piszcz
Date: Sat Jan 23 2010 - 10:48:59 EST


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.

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?

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