Public bug reported:
This occurred with a clean install of Ubuntu 10.10 reverting to kernel
2.6.34-02063407 resolved the issue. Now I've upgraded to 11.04 problem
has reoccurred.
Laptop is Lenovo T400 with latest bios update. Periodically system will
freeze for approx 10-15 seconds then control can be regained but mouse
moment is jerky for another 10-15 seconds. Multiple kworker processes
use approx 50-90% CPU when view using top. After approx 30 seconds from
start of issue control is back to normal.
Issue seems to occur randomly, sometimes hours after boot, sometimes
minutes.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic-pae 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: wiggy 1479 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfc020000 irq 48'
Mixer name : 'Conexant CX20561 (Hermosa)'
Components : 'HDA:14f15051,17aa211c,00100000'
Controls : 16
Simple ctrls : 8
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
7VHT16WW-1.06'
Mixer name : 'ThinkPad EC 7VHT16WW-1.06'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Mon May 9 08:05:42 2011
HibernationDevice: RESUME=UUID=b23044b8-b130-476a-a926-a3872fe01aaa
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO 6475FM4
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
LANGUAGE=en_GB:en
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic-pae
root=UUID=756f4157-72df-4327-b193-6739cb49661d ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-8-generic-pae N/A
linux-backports-modules-2.6.38-8-generic-pae N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-05-07 (1 days ago)
WifiSyslog:
dmi.bios.date: 03/11/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 7UET92WW (3.22 )
dmi.board.name: 6475FM4
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr7UET92WW(3.22):bd03/11/2011:svnLENOVO:pn6475FM4:pvrThinkPadT400:rvnLENOVO:rn6475FM4:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 6475FM4
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 natty running-unity
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https://bugs.launchpad.net/bugs/779753
Title:
T400 laptop. Freezes or mouse stutters. Kworker process using too much
CPU.
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