From: Jamie Lokier <jamie@shareable.org>
To: Vojtech Pavlik <vojtech@suse.cz>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Increasing HZ (patch for HZ > 1000)
Date: Fri, 12 Dec 2003 23:45:23 +0000 [thread overview]
Message-ID: <20031212234523.GE15935@mail.shareable.org> (raw)
In-Reply-To: <20031212225856.GA30751@ucw.cz>
Vojtech Pavlik wrote:
> > > I'd advocate lower HZ. Say, oh I dunno...100? This is better for power
> > > management and also should make the sound go away.
> >
> > Alas, the sound my Toshiba laptop makes when the CPU is busy is the
> > same frequency whatever kernel, and by extension whatever the timer
> > frequency. I guess it must have another cause :/
>
> If it's when the CPU is busy, then it's the CPU's DC/DC converter. There
> is no way to get rid of the noise without mnodifying the notebook.
It only does it when the CPU is busy in any low power mode. In
maximum power mode it never makes the noise. It sounds like it's
coming from the speakers (independent of volume control though), but
it might not be.
Would the DC/DC converter noise be explained by a low quality
capacitor used by the converter?
-- Jamie
next prev parent reply other threads:[~2003-12-12 23:45 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-11 19:22 Increasing HZ (patch for HZ > 1000) Grover, Andrew
2003-12-12 22:31 ` Jamie Lokier
2003-12-12 22:58 ` Vojtech Pavlik
2003-12-12 23:45 ` Jamie Lokier [this message]
2003-12-13 8:36 ` Vojtech Pavlik
-- strict thread matches above, loose matches on Subject: below --
2003-12-12 15:52 Vincent Legoll
2003-12-11 6:05 Jean-Marc Valin
2003-12-11 7:07 ` Martin J. Bligh
2003-12-11 7:15 ` Jean-Marc Valin
2003-12-11 7:18 ` Martin J. Bligh
2003-12-11 17:18 ` Gene Heskett
2003-12-11 17:33 ` Martin J. Bligh
2003-12-11 18:10 ` Richard B. Johnson
2003-12-11 19:14 ` Gene Heskett
2003-12-11 18:35 ` Gene Heskett
2003-12-12 22:08 ` Pavel Machek
2003-12-12 22:57 ` Jean-Marc Valin
2003-12-12 23:18 ` Måns Rullgård
2003-12-12 23:40 ` Pavel Machek
2003-12-13 2:25 ` Måns Rullgård
2003-12-16 3:04 ` john stultz
2003-12-16 5:20 ` Mitchell Blank Jr
2003-12-14 1:05 ` bill davidsen
2003-12-14 4:48 ` Pat Erley
2003-12-11 7:30 ` Nick Piggin
2003-12-11 8:25 ` Tim Schmielau
2003-12-12 8:00 ` Jean-Marc Valin
2003-12-12 22:10 ` Pavel Machek
2003-12-12 22:50 ` Jean-Marc Valin
2004-01-03 18:16 ` Bill Davidsen
[not found] ` <010f01c415a4_27033d00_d100000a@sbs2003.local>
2004-04-06 13:00 ` Pavel Machek
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