Sometimes system works too slow

[n0dwis]

Bug starts to show up after last kernel update (3.8.0.21.37). Sometimes system works very slow. 'top' command shows that many processes produces 40-50% CPU loading. Processes every time are different. Once udevd daemon produced 70% CPU loading and even 'ps' command freezed when it's output was on udevd. java (tomcat, I think) and xorg produces over 100% thery often. CPU cooler during this works on maximum frequency and doesn't stop. CPU temperature increases to 60-65C.

After reboot everything works fine. Now summary CPU loading less then 10%, temperature - 40-45C. In spite of I have several hard programs (eclipse, chrome, thunderbird and other) launched.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-21-generic 3.8.0-21.32
ProcVersionSignature: Ubuntu 3.8.0-21.32-generic 3.8.8
Uname: Linux 3.8.0-21-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: n0dwis 3268 F.... pulseaudio
CRDA:
 country GB:
  (2402 - 2482 @ 40), (N/A, 20)
  (5170 - 5250 @ 40), (N/A, 20)
  (5250 - 5330 @ 40), (N/A, 20), DFS
  (5490 - 5710 @ 40), (N/A, 27), DFS
Date: Fri May 17 08:39:37 2013
HibernationDevice: RESUME=UUID=39db50b4-442e-4732-adf2-ad8492079e67
InstallationDate: Installed on 2012-06-10 (340 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MachineType: LENOVO 20060
MarkForUpload: True
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-21-generic root=UUID=9f2185a6-57eb-4da4-b692-5af7d9ff7990 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-3.8.0-21-generic N/A
 linux-backports-modules-3.8.0-21-generic N/A
 linux-firmware 1.106
SourcePackage: linux
UpgradeStatus: Upgraded to raring on 2013-04-25 (21 days ago)
dmi.bios.date: 07/08/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 29CN29WW(V2.06)
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: LENOVO
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnLENOVO:bvr29CN29WW(V2.06):bd07/08/2010:svnLENOVO:pn20060:pvrIdeapadZ560:rvnLENOVO:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: 20060
dmi.product.version: Ideapad Z560
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.10 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10-rc1-saucy/

[n0dwis (n0dwis-u)]

I have tested kernels 3.10 and 3.9.2 and didn't observe this bug. So it seems like it fixed. But both of this kernels works incorrect at my laptop - there are problems when loading nvidia module. I can't even works normally. Maybe it because of absence linux-image-extra package for both of this kernels.
This means that environment for stable system and tested kernels was different. And I don't know if this matter on bug reproduce.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]