From: Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>
To: Pavel Machek <pavel-AlSwsSmVLrQ@public.gmane.org>
Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: High pitch noise produced when ACPI processor module loaded
Date: Mon, 6 Oct 2003 09:41:19 -0700 (PDT) [thread overview]
Message-ID: <20031006093904.K3158@root.org> (raw)
In-Reply-To: <20031005102452.GA321-I/5MKhXcvmPrBKCeMvbIDA@public.gmane.org>
On Sun, 5 Oct 2003, Pavel Machek wrote:
> > > > > 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.
> >
> > > Try running while1 program, see if it helps.
> > Yes!, when there is intensive processor activity the sound goes away.
>
> This unfortunately seems fairly normal; at least all four notebooks I
> had for testing produced some kind of cpu-related noise.
It's a *feature*. I've implemented a Cx driver for FreeBSD and it's
useful to be able to tell if the code really is entering the desired state
by holding the laptop up to my ear. I can differentiate all the Cx states
but not in the Px states. :)
-Nate
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next prev parent reply other threads:[~2003-10-06 16:41 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-26 7:59 High pitch noise produced when ACPI processor module loaded Sander Wichers
[not found] ` <001001c38404$27b959a0$2001a8c0-x1nb5Wr35Zb2xqEl7TXlHQ@public.gmane.org>
2003-09-26 17:06 ` Nate Lawson
[not found] ` <20030926100512.X64952-Y6VGUYTwhu0@public.gmane.org>
2003-10-02 11:12 ` Pavel Machek
2003-10-05 9:35 ` Sander Wichers
[not found] ` <000401c38b23$fddef730$2401a8c0-laDPoAWcecs@public.gmane.org>
2003-10-05 10:24 ` Pavel Machek
[not found] ` <20031005102452.GA321-I/5MKhXcvmPrBKCeMvbIDA@public.gmane.org>
2003-10-06 16:41 ` Nate Lawson [this message]
[not found] ` <20031006093904.K3158-Y6VGUYTwhu0@public.gmane.org>
2003-10-06 17:12 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2003-10-06 17:53 Grover, Andrew
[not found] ` <F760B14C9561B941B89469F59BA3A84702C9300A-sBd4vmA9Se4Lll3ZsUKC9FDQ4js95KgL@public.gmane.org>
2003-10-06 17:59 ` Pavel Machek
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