From: Troels Walsted Hansen <troels@thule.no>
To: Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
Cc: linux-kernel@vger.kernel.org
Subject: Re: High-pitch noise with 2.6.0-test11
Date: Fri, 05 Dec 2003 11:31:56 +0100 [thread overview]
Message-ID: <3FD05E9C.5080501@thule.no> (raw)
In-Reply-To: <1070605910.4867.9.camel@idefix.homelinux.org>
Jean-Marc Valin wrote:
> I just installed 2.6.0-test11 on my Dell Latitude D600 (Pentium-M)
> laptop and I noticed a strange high-pitch noise comming from the laptop
> itself (that wasn't there with 2.4). The noise happens only when the CPU
> is idle. Also, I have noticed that removing thermal.o makes the noise
> stop, which is very odd. Is there anything that can be done about that?
I had the same problem with my Dell Latitude C600 and newer kernels with
HZ>100. The solution I found was to add "apm=idle-threshold=100" to
the kernel commandline, to disable APM idle calls.
You should monitor the temperature of your laptop to make sure it
doesn't spin wildly and create extra heat if you use the same solution.
Using ACPI instead of APM might also be a solution?
Troels
next prev parent reply other threads:[~2003-12-05 10:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-05 6:31 High-pitch noise with 2.6.0-test11 Jean-Marc Valin
2003-12-05 7:32 ` Jean-Marc Valin
2003-12-05 10:31 ` Troels Walsted Hansen [this message]
2003-12-05 14:53 ` Jean-Marc Valin
2003-12-06 11:46 ` Andrew McGregor
2003-12-07 17:26 ` Pavel Machek
2003-12-09 6:46 ` Jean-Marc Valin
-- strict thread matches above, loose matches on Subject: below --
2003-12-05 18:49 Grover, Andrew
2003-12-05 19:09 ` Jean-Marc Valin
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