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Bug 44524 - CPU disconnect function of nforce2 chipset causes background noise in sound output
Summary: CPU disconnect function of nforce2 chipset causes background noise in sound o...
Status: VERIFIED CANTFIX
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: x86 Linux
: High minor (vote)
Assignee: Gentoo Linux bug wranglers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2004-03-12 19:10 UTC by Patrick Vanier
Modified: 2004-03-14 15:34 UTC (History)
0 users

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Package list:
Runtime testing required: ---


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Description Patrick Vanier 2004-03-12 19:10:21 UTC
When system is idle, a background whine/whistle/interference can be heard in the background through the Line-Out of the motherboard's sound ouputs.

It disappears when system is active (when the user is interacting with the system).

Reproducible: Always
Steps to Reproduce:
1. Boot Gentoo, login and leave the system idle. 
2. emerge athcool
3. Check CPU disconnect with athcool stat
4. If CPU disconnect is on, whine will be heard in the background
5 if CPU disconnect is off, output is completely silent
Actual Results:  
athcool on : background whine can be heard
athcool off: background whine disappears.

Expected Results:  
Output from Line-Out should be completely silent, unless a program is actually producing sound.

Also, support for CPU-disconnect is nice, since it brings down the CPU temperature by about 5-10
Comment 1 Patrick Vanier 2004-03-12 19:10:21 UTC
When system is idle, a background whine/whistle/interference can be heard in the background through the Line-Out of the motherboard's sound ouputs.

It disappears when system is active (when the user is interacting with the system).

Reproducible: Always
Steps to Reproduce:
1. Boot Gentoo, login and leave the system idle. 
2. emerge athcool
3. Check CPU disconnect with athcool stat
4. If CPU disconnect is on, whine will be heard in the background
5 if CPU disconnect is off, output is completely silent
Actual Results:  
athcool on : background whine can be heard
athcool off: background whine disappears.

Expected Results:  
Output from Line-Out should be completely silent, unless a program is actually producing sound.

Also, support for CPU-disconnect is nice, since it brings down the CPU temperature by about 5-10°C.

motherboard: MSI K7N2-L (nForce2 chipset)
CPU: Athlon XP 2500+ Barton
Gentoo 2004.0, kernel 2.6.3 with ACPI, ALSA modules.
Comment 2 Patrick Vanier 2004-03-14 15:32:43 UTC
Tested with Windows XP, and the problem is also present.
Therefore, it seems it's a motherboard/chipset/BIOS problem, and has nothing to do with Gentoo.
Comment 3 Patrick Vanier 2004-03-14 15:34:13 UTC
Not a Gentoo bug.