From: "Måns Rullgård" <mru@mru.ath.cx>
To: linux-kernel@vger.kernel.org
Subject: Re: High pitched noise from laptop: processor.c in linux 2.6
Date: Thu, 07 Oct 2004 12:53:00 +0200 [thread overview]
Message-ID: <yw1x7jq2n6k3.fsf@mru.ath.cx> (raw)
In-Reply-To: <20041007103210.GA32260@atrey.karlin.mff.cuni.cz>
Pavel Machek <pavel@ucw.cz> writes:
> Hi!
>
>> I recently upgraded from linux 2.4.27 to 2.6.8.1 and noticed my laptop
>> now makes a high pitch noise while idle. I traced it back to the
>> processor module for acpi. 'rmmod processor' stops the noise.
>>
>>
>>
>> Using speed step to turn it down to 733 Mhz makes it a
>> little quieter and doesn't change the tone.
>>
>>
>>
>> Is there any way to stop this? I googled around and found it had
>> something to do with idle frequency of 1000 Hz in 2.6 instead of 100Hz
>> in the 2.4 kernel. I couldn't find much else on this. Hunting around the
>> code didn't help much, I don't know C.
>
> Change #define HZ 1000 to #define HZ 100...
... and lose all the benefits of HZ=1000. What would happen if one
were to set HZ to a higher value, like 10000?
> Ouch and btw it is hardware problem -- too cheap capacitors.
> Pavel
> --
> Boycott Kodak -- for their patent abuse against Java.
Actually, I don't know which is worse, patent abuse or Java misuse.
--
Måns Rullgård
mru@mru.ath.cx
next prev parent reply other threads:[~2004-10-07 11:11 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-07 9:30 Fraz
2004-10-07 10:32 ` Pavel Machek
2004-10-07 10:53 ` Måns Rullgård [this message]
2004-10-07 14:32 ` Pavel Machek
2004-10-16 19:52 ` Lee Revell
2004-10-16 21:46 ` Alan Cox
2004-10-17 1:24 ` Lee Revell
2004-10-17 1:50 ` Kyle Moffett
2004-10-17 2:21 ` Alan Cox
2004-10-17 3:33 ` Lee Revell
2004-10-22 11:40 ` Alexandre Oliva
2004-10-16 19:59 ` Måns Rullgård
2004-10-16 20:42 ` Pavel Machek
2004-10-07 14:34 ` Pavel Machek
2004-10-17 0:45 ` Alex Riesen
2004-10-07 10:37 ` Christian Hesse
2004-10-17 5:21 Albert Cahalan
2004-10-18 3:51 Yu, Luming
2004-10-18 11:41 ` Pavel Machek
2004-10-20 14:47 ` Måns Rullgård
2004-10-20 15:47 ` Pavel Machek
2004-10-20 16:37 ` Måns Rullgård
2004-10-20 16:49 ` Jan-Benedict Glaw
2004-10-20 16:53 ` Pavel Machek
2004-10-20 16:53 ` Lee Revell
2004-10-20 17:13 ` Måns Rullgård
2004-10-21 20:32 ` Lee Revell
2004-10-21 21:39 ` Jon Masters
2004-10-20 23:31 ` Giuseppe Bilotta
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