whining noise - possible bug in nForce2 support?

whining noise - possible bug in nForce2 support?

[Dexter Filmore]

Don't know who else to ask about this: 

Just upgraded my mobo to a ECS N2U400-A nForce2 board, standard MCP
southbridge, latest BIOS.
CPU is AMD Athlon XP 1800+, 2x256MB PC266 RAM.
Kernel version is 2.6.7, tested distros are Slackware 10 and Knoppix 3.4.

Board work alright so far, but as soon as I start a 2.6 kernel, the board will
produce a high pitched whining sound.
This doesn't happen with 2.4 or a wide spread OS from Redmond, only with 2.6.
I tried test kernels without ACPI, APM and such, no success.

Interesting thing: as long as the hard disk has something to do, the noise
vanishes but returns as soon as the disk idles again.

This is way beyond me. Anybody got an idea?

Dex



-- 
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d--(+)@ s-:+ a- C+++(++++) UL+>++++ P+>++ L+++>++++ E-- W++ N o? K-
w--(---) !O M+ V- PS++(+) PE(-) Y+ PGP(-) t++(---)@ 5 X+(++) R+(++) tv--(+)@ 
b+(+++) DI+++ D G++ e* h>++ r%>* y?
------END GEEK CODE BLOCK------

http://www.againsttcpa.com - nothing fights like the opposition

Re: whining noise - possible bug in nForce2 support?

[Petr Vandrovec]

On 26 Jul 04 at 23:36, Dexter Filmore wrote:
> 
> Just upgraded my mobo to a ECS N2U400-A nForce2 board, standard MCP
> southbridge, latest BIOS.
> CPU is AMD Athlon XP 1800+, 2x256MB PC266 RAM.
> Kernel version is 2.6.7, tested distros are Slackware 10 and Knoppix 3.4.
> 
> Board work alright so far, but as soon as I start a 2.6 kernel, the board will
> produce a high pitched whining sound.
> 
> Interesting thing: as long as the hard disk has something to do, the noise
> vanishes but returns as soon as the disk idles again.

Are you sure that it has something to do with disk and not with processor?
What if you run 'while true; do :; done', is not it sufficient to get
rid of noise?

If it is sufficient, then rebuild your kernel with HZ=100 instead of 
using default 1000Hz. At least it silenced my Compaq notebook.
                                                   Best regards,
                                                      Petr Vandrovec
                                                      

Re: whining noise - possible bug in nForce2 support?

[Takashi Iwai]

At Mon, 26 Jul 2004 23:36:51 +0200,
Dexter Filmore wrote:
> 
> 
> Don't know who else to ask about this: 
> 
> Just upgraded my mobo to a ECS N2U400-A nForce2 board, standard MCP
> southbridge, latest BIOS.
> CPU is AMD Athlon XP 1800+, 2x256MB PC266 RAM.
> Kernel version is 2.6.7, tested distros are Slackware 10 and Knoppix 3.4.
> 
> Board work alright so far, but as soon as I start a 2.6 kernel, the board will
> produce a high pitched whining sound.
> This doesn't happen with 2.4 or a wide spread OS from Redmond, only with 2.6.
> I tried test kernels without ACPI, APM and such, no success.
> 
> Interesting thing: as long as the hard disk has something to do, the noise
> vanishes but returns as soon as the disk idles again.
> 
> This is way beyond me. Anybody got an idea?

If you have 'IEC958 Input Monitor' switch on, try to turn it off.


Takashi