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From: Erik Schanze <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: system noise when using ACPI module processor
Date: Sat, 4 Dec 2004 17:22:06 +0100
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Package: kernel-source-2.6.8
Severity: minor
Version: 2.6.8-10
Hi!
There is a problem with ACPI module "processor" in recent 2.6er kernels.
After loading this module my pentium-m notebook (ACER TM291) makes a very=20
high-pitched sound (not the fan) on idle. It sounds like an old CRT monitor
shortly before its end. :-)=20
It's caused by a change in include/asm-i386/param.h, where HZ was set=20
from 100 to 1000.
I have already send my notebook back to the vendor for repair the=20
"singing capacitor" on the mainboard, but I got it back unrepaired.=20
They could not reproduce this behavoiur under Windows. :-(
This uses a 100Hz timer, so I have no chance of repair.
Google tells, it is a known problem which was previously discussed at Kernel
Bug Tracker.=20
http://bugme.osdl.org/show_bug.cgi?id=3D2478
http://bugme.osdl.org/show_bug.cgi?id=3D3549
http://bugme.osdl.org/show_bug.cgi?id=3D3406
But the patch for "#define HZ" was rejected.
Since I'm not sure that the found solution (disabling of C3) is the best=20
solution and this patch will be included in 2.6.10, I'd like to ask you=20
for a Debian patch to switch back to HZ=3D100.=20
Please consider to add attached patch.
I like the distribution kernel very much (together with m-a) and it would
be a pity to have to build my own kernel caused by this issue.
Kindly regards,
Erik
=2D-=20
www.ErikSchanze.de *********************************************
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=2D-- linux-2.6.7/include/asm-i386/param.h 2004-06-17 09:34:28.000000000
+0=
800
+++ linux-2.6.7-new/include/asm-i386/param.h 2004-07-19 13:30:54.207125536 =
+0800
@@ -2,7 +2,7 @@
#define _ASMi386_PARAM_H
=20
#ifdef __KERNEL__
=2D# define HZ 1000 /* Internal kernel timer frequency */
+# define HZ 100 /* Internal kernel timer frequency */
# define USER_HZ 100 /* .. some user interfaces are in
"ticks" */
# define CLOCKS_PER_SEC (USER_HZ) /* like times() */
#endif
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Date: Sat, 15 Oct 2005 01:37:34 +0200
From: maximilian attems <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: Bug#284213: system noise when using ACPI module processor
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autolearn=no version=2.60-bugs.debian.org_2005_01_02
On Sat, 04 Dec 2004, Erik Schanze wrote:
> There is a problem with ACPI module "processor" in recent 2.6er kernels.
> After loading this module my pentium-m notebook (ACER TM291) makes a very
> high-pitched sound (not the fan) on idle. It sounds like an old CRT monitor
> shortly before its end. :-)
>
> It's caused by a change in include/asm-i386/param.h, where HZ was set
> from 100 to 1000.
>
> I have already send my notebook back to the vendor for repair the
> "singing capacitor" on the mainboard, but I got it back unrepaired.
> They could not reproduce this behavoiur under Windows. :-(
> This uses a 100Hz timer, so I have no chance of repair.
>
> Google tells, it is a known problem which was previously discussed at Kernel
> Bug Tracker.
> http://bugme.osdl.org/show_bug.cgi?id=2478
> http://bugme.osdl.org/show_bug.cgi?id=3549
> http://bugme.osdl.org/show_bug.cgi?id=3406
>
> But the patch for "#define HZ" was rejected.
> Since I'm not sure that the found solution (disabling of C3) is the best
> solution and this patch will be included in 2.6.10, I'd like to ask you
> for a Debian patch to switch back to HZ=100.
>
> Please consider to add attached patch.
>
> I like the distribution kernel very much (together with m-a) and it would
> be a pity to have to build my own kernel caused by this issue.
>
>
> Kindly regards,
>
> Erik
latest linux image 2.6.13 in experimental uses new default upstream
CONFIG_HZ_250, therefor closing your bugreport.
--
maks
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