I've this issue since the latest Ubuntu 11.10 version, all updates applied till today, and it's still there. Ubuntu 11.04 did not have this issue.
If I run top there is a Kworker constantly taking much CPU, I don't know how to research where this comes from.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-12-generic 3.0.0-12.20
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 1.23-0ubuntu4
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: kp 1473 F.... pulseaudio
CRDA: Error: [Errno 2] Bestand of map bestaat niet
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xe4404000 irq 46'
Mixer name : 'Analog Devices AD1981'
Components : 'HDA:11d41981,103c30c0,00100200 HDA:11c11040,103c1378,00100200'
Controls : 11
Simple ctrls : 9
Date: Tue Nov 8 22:29:10 2011
HibernationDevice: RESUME=UUID=ad8d4a18-9fe4-4246-ba44-85cf6b4dace5
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: Hewlett-Packard HP Compaq 6710b (GB891ET#ABH)
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=686d2155-83a9-4743-a2a4-8e9570ee3da6 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.0.0-12-generic N/A
linux-backports-modules-3.0.0-12-generic N/A
linux-firmware 1.60
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/15/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68DDU Ver. F.15
dmi.board.name: 30C0
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 71.2E
dmi.chassis.asset.tag: CNU72913PH
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68DDUVer.F.15:bd01/15/2009:svnHewlett-Packard:pnHPCompaq6710b(GB891ET#ABH):pvrF.15:rvnHewlett-Packard:rn30C0:rvrKBCVersion71.2E:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq 6710b (GB891ET#ABH)
dmi.product.version: F.15
dmi.sys.vendor: Hewlett-Packard
Would it be possible for you to test the latest upstream kernel? It will allow additional upstream developers to examine the issue. Refer to https:/ /wiki.ubuntu. com/KernelMainl ineBuilds . If possible, please test the latest v3.2-rcN kernel (Not a kernel in the daily directory). Once you've tested the upstream kernel, please remove the 'needs- upstream- testing' tag(Only that one tag, please leave the others). This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs- upstream- testing' text.
If this bug is fixed by the mainline kernel, please add the following tag 'kernel- fixed-upstream- KERNEL- VERSION' . For example, if kernel version 3.2-rc1 fixed and issue, the tag would be: 'kernel- fixed-upstream- v3.2-rc1' .
If the mainline kernel does not fix this bug, please add the tag: 'kernel- bug-exists- upstream' .
Thanks in advance.