From: Vojtech Pavlik <vojtech@suse.cz>
To: Jamie Lokier <jamie@shareable.org>
Cc: Vojtech Pavlik <vojtech@suse.cz>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Increasing HZ (patch for HZ > 1000)
Date: Sat, 13 Dec 2003 09:36:54 +0100 [thread overview]
Message-ID: <20031213083654.GA32110@ucw.cz> (raw)
In-Reply-To: <20031212234523.GE15935@mail.shareable.org>
On Fri, Dec 12, 2003 at 11:45:23PM +0000, Jamie Lokier wrote:
> 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?
Yes.
--
Vojtech Pavlik
SuSE Labs, SuSE CR
next prev parent reply other threads:[~2003-12-13 8:37 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
2003-12-13 8:36 ` Vojtech Pavlik [this message]
-- 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20031213083654.GA32110@ucw.cz \
--to=vojtech@suse.cz \
--cc=jamie@shareable.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.