[ACPI-sppt] High pitch noise produced when ACPI processor module loaded

Hi,

My inspiron 8600 (intel centrino/855PM) is producing a strange high pitch
sound which comes from within the machine (definitly not the speakers) when
the acpi processor module get's loaded. When I unload the processor module
the high pitch sound goes away.

Luckily I'm not the only with a dell inspiron having this problem. So far
I've seen bug reports from people with an inspiron 8x00 / and lattitude C840
/ C600 series:
http://www.ussg.iu.edu/hypermail/linux/kernel/0307.1/index.html#2247
http://www.ussg.iu.edu/hypermail/linux/kernel/0305.1/index.html#628

The workarounds displayed in the links above don't do anything with the real
problem....

I've tried to turn of frequency scaling, this doesn't influence anything. I
also tried the apm workaround > no luck either.

This isn't normal behavior, is it? The noise is very annoying, it makes you
not want to sit behind the machine! Is there a workaround for this?

thanks,

Sander



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