From: Bill Gribble <grib@billgribble.com>
To: "Alexander E. Patrakov" <patrakov@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Mystery clicking under keyboard, 3.x only, SSD only
Date: Mon, 12 Dec 2011 12:27:53 -0500 [thread overview]
Message-ID: <1323710873.3638.2.camel@debian.lii> (raw)
In-Reply-To: <4EE635A2.8080705@gmail.com>
On Mon, 2011-12-12 at 23:10 +0600, Alexander E. Patrakov wrote:
> This clicking can be related to the events when the device goes to deep
> powersaving levels. Fluctuations in the consumed current can lead to
> audible clicks due to bad screening of audio wires, loose ferrite cores
> in the coils, magnetostriction effect, etc.
>
> You can test this theory by running several copies of "yes > /dev/null"
> and thus eating 100% CPU. If this eliminates the clicking effect, then
> my guess is correct and you have to disable some of the deepest
> powersaving states to remove the clicks.
Got it in one! Causing 100% CPU utilization does indeed stop the
clicking. I will look for power saving settings that I can control.
Thanks,
Bill Gribble
prev parent reply other threads:[~2011-12-12 17:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-11 19:24 Mystery clicking under keyboard, 3.x only, SSD only Bill Gribble
2011-12-12 17:10 ` Alexander E. Patrakov
2011-12-12 17:27 ` Bill Gribble [this message]
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