Public bug reported:
If the CPU is idle (all 4 cores), then there is a high pitch noise
coming from the PC box (probably the CPU or some part of mainboard).
This does NOT happen if:
- if I use older kernel from ubuntu 9.04
- If I use kernel 2.6.28-13
- if there is anything running, in example memtester or any program that uses
(most of 1 core?) of CPU
otherwise, there is constantly this noise.
It is probably not from fan.
I would guess, too quick frequency scaling causes some strange effect or
something?
It is definitely NOT from speakers (nor from PC beeper).
00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 03)
details of harderwer I attached here by apport-bug I hope.
ProblemType: Bug
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: rafal 7371 F.... pulseaudio
rafal 8870 F.... kmix
/dev/snd/controlC1: rafal 7371 F.... pulseaudio
rafal 8870 F.... kmix
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not
found.
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd3220000 irq 22'
Mixer name : 'Analog Devices AD1882'
Components : 'HDA:11d41882,80861003,00100300'
Controls : 41
Simple ctrls : 24
Card1.Amixer.info:
Card hw:1 'U0x46d0x804'/'USB Device 0x46d:0x804 at usb-0000:00:1a.7-6, high
speed'
Mixer name : 'USB Mixer'
Components : 'USB046d:0804'
Controls : 2
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'Mic',0
Capabilities: cvolume cvolume-joined cswitch cswitch-joined
Capture channels: Mono
Limits: Capture 0 - 6144
Mono: Capture 3898 [63%] [6.00dB] [on]
Date: Tue Nov 3 03:02:08 2009
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=68f267d8-6ac0-48bd-97e4-9531ffd2358f
IwConfig:
lo no wireless extensions.
eth3 no wireless extensions.
eth2 no wireless extensions.
NonfreeKernelModules: nvidia
Package: linux-image (not installed)
ProcCmdLine: root=UUID=e5818be3-b3f1-4d34-b801-1d8728425e88 ro quiet
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
linux-backports-modules-2.6.31-14-generic 2.6.31-14.16
linux-firmware 1.24
RfKill:
SourcePackage: linux-meta
Uname: Linux 2.6.31-14-generic x86_64
WpaSupplicantLog:
dmi.bios.date: 10/30/2008
dmi.bios.vendor: Intel Corp.
dmi.bios.version: CBQ4510H.86A.0063.2008.1030.1632
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DQ45CB
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE30148-206
dmi.chassis.type: 2
dmi.modalias:
dmi:bvnIntelCorp.:bvrCBQ4510H.86A.0063.2008.1030.1632:bd10/30/2008:svn:pn:pvr:rvnIntelCorporation:rnDQ45CB:rvrAAE30148-206:cvn:ct2:cvr:
** Affects: linux-meta (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug
--
CPU/mainboard emmit high sound-noise if the CPU is idle. On 2.6.31-14-generic
with quad core intel
https://bugs.launchpad.net/bugs/472046
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