Ubuntu
linux package

unexpected load with 0% CPU and no activity

Bug #683959 reported by Fabien Tassin on 2010-12-02

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Expired	Medium	Unassigned

Bug Description

Since i moved 2 of my desktops to Natty, they show an unexpected load of 0.6 to 2 when they are idle (used to be <= 0.01 in Maverick).

When playing something with mplayer, it's now jerky, every minute or so, there's a tiny glitch (both sound and video), it was perfectly fine before Natty.

$ uptime
02:56:16 up 17 min, 4 users, load average: 0.78, 0.90, 0.76
$ vmstat 5
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 1892116 78980 373572 0 0 206 24 85 389 9 1 85 5
0 0 0 1892108 78980 373572 0 0 0 0 81 290 4 0 96 0
0 0 0 1892108 78980 373572 0 0 0 17 67 261 4 0 96 0
0 0 0 1892076 78984 373572 0 0 0 1 66 266 4 0 96 0
0 0 0 1892076 78984 373572 0 0 0 1 66 262 3 0 96 0
0 0 0 1892076 78992 373572 0 0 0 7 70 281 4 0 96 1
0 0 0 1892108 78992 373572 0 0 0 0 67 263 4 0 96 0

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.37-7-generic 2.6.37-7.19
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.37-7.19-generic 2.6.37-rc3
Uname: Linux 2.6.37-7-generic i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: fta 1615 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xe6000000 irq 41'
   Mixer name : 'Realtek ALC883'
   Components : 'HDA:10ec0883,1458c603,00100002'
   Controls : 40
   Simple ctrls : 22
Date: Thu Dec 2 02:40:58 2010
HibernationDevice: RESUME=UUID=9cb1e7ef-4f73-4643-87f1-66301a736e45
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100331)
IwConfig:
lo no wireless extensions.

eth0 no wireless extensions.
ProcEnviron:
PATH=(custom, user)
LANG=en_US.utf8
SHELL=/usr/bin/tcsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-7-generic root=UUID=03e1779a-d90a-4b59-8b03-2d1198aeb7cc ro quiet splash
RelatedPackageVersions: linux-firmware 1.40
RfKill:

SourcePackage: linux
dmi.bios.date: 08/04/2006
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: 945PL-S3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd08/04/2006:svn:pn:pvr:rvnGigabyteTechnologyCo.,Ltd.:rn945PL-S3:rvrx.x:cvn:ct3:cvr:

Tags:

Revision history for this message

Fabien Tassin (fta) wrote on 2010-12-02:

AcpiTables.txt Edit (68.7 KiB, text/plain; charset="utf-8")
AlsaDevices.txt Edit (587 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (273 bytes, text/plain; charset="utf-8")
ArecordDevices.txt Edit (386 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (40.8 KiB, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (4.4 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.2.txt Edit (13.3 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (494 bytes, text/plain; charset="utf-8")
Dependencies.txt Edit (1.8 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (9.8 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (446 bytes, text/plain; charset="utf-8")
PciMultimedia.txt Edit (611 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcCpuinfo_.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.4 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (1.9 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (98.0 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (204.3 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (69.1 KiB, text/plain; charset="utf-8")

Jeremy Foshee (jeremyfoshee) on 2010-12-08

tags:

added: kernel-series-unknown

Revision history for this message

Fabien Tassin (fta) wrote on 2010-12-08:

unknown series?

it's the default natty kernel. Right now:

ii linux-image-2.6.37-8-generic 2.6.37-8.21 Linux kernel image for version 2.6.37 on x86/x86_64
ii linux-image-generic 2.6.37.8.10 Generic Linux kernel image

Ubuntu Foundations Team Bug Bot (crichton) on 2010-12-20

tags:

added: regression-release
removed: regression-update

Brad Figg (brad-figg) on 2011-04-07

Changed in linux (Ubuntu):
status:	New → Confirmed

Revision history for this message

Fabien Tassin (fta) wrote on 2011-06-08:

still there 6 months later in oneiric :(

Revision history for this message

penalvch (penalvch) wrote on 2012-07-25:

Fabien Tassin, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command in the development release from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux <replace-with-bug-number>

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please do not test the kernel in the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. 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. As well, please comment on which kernel version specifically you tested.

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', and comment as to why specifically you were unable to test it.

Please let us know your results. Thanks in advance.

Helpful Bug Reporting Links:
https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette
https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported
https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug
https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug

apport-collect -p linux <replace-with-bug-number>

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', and comment as to why specifically you were unable to test it.

Please let us know your results. Thanks in advance.

tags:	added: oneiric
tags:	removed: kernel-series-unknown
Changed in linux (Ubuntu):
importance:	Undecided → Medium
status:	Confirmed → Incomplete

Revision history for this message

Launchpad Janitor (janitor) wrote on 2012-09-24:

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

Changed in linux (Ubuntu):
status:	Incomplete → Expired

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unexpected load with 0% CPU and no activity

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