[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Mon, 12 Dec 2011 12:27:53 -0500
From: Bill Gribble <grib@...lgribble.com>
To: "Alexander E. Patrakov" <patrakov@...il.com>
Cc: linux-kernel@...r.kernel.org
Subject: Re: Mystery clicking under keyboard, 3.x only, SSD only
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists