linux-kernel - Re: [RFC][PATCH] cpuidle: avoid singing capacitors

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Message-ID: <20080305190125.7417d4ff@mjolnir.drzeus.cx>
Date:	Wed, 5 Mar 2008 19:01:25 +0100
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Alan Jenkins <alan-jenkins@...fmail.co.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] cpuidle: avoid singing capacitors

On Wed, 05 Mar 2008 09:32:15 -0800
Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> 
> More likely inductors, I think.  The coils can vibrate against the coil 
> if they haven't been properly potted in something.  Capacitors don't 
> really have anything which can "sing".
> 

I have no idea. Previous reports of this behaviour have always been described as "singing" capacitors and explained by some piezoelectric effect.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org
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