Luis Alberto Pabón, thank you for reporting this and helping make Ubuntu
better. As per http://support.ts.fujitsu.com/Download/ShowFiles.asp an
update to your computer's buggy and outdated BIOS is available (1.18).
If you update to this following
https://help.ubuntu.com/community/BIOSUpdate does it change anything?
If it doesn't, could you please both specify what happened, and provide the
output of the following terminal command:
sudo dmidecode -s bios-version sudo dmidecode -s bios-release-date
For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.
Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful. As well, you don't
have to create a new bug report.
Once the BIOS is updated, and the information above is provided, then
please mark this report Status Confirmed.
Thank you for your understanding.
** Tags added: bios-outdated-1.18
** Description changed:
On a fresh vivid install, the kworker process is using a constant 100%
- of one of 4 virtual cores. I can work around this issue by following the
- following guide: http://askubuntu.com/questions/176565/why-does-kworker-
- cpu-usage-get-so-high and it's the same issue as in #1087010
+ of one of 4 virtual cores. This also happened on 13.10, I had to apply
+ the same workaround back then.
- GPE13.
-
- This also happened on 13.10, I had to apply the same workaround back
- then.
+ WORKAROUND: http://askubuntu.com/questions/176565/why-does-kworker-cpu-
+ usage-get-so-high
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-16-generic 3.19.0-16.16
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
- USERPID ACCESS COMMAND
- /dev/snd/controlC1: development 2513 F pulseaudio
- /dev/snd/controlC0: development 2513 F pulseaudio
+ USERPID ACCESS COMMAND
+ /dev/snd/controlC1: development 2513 F pulseaudio
+ /dev/snd/controlC0: development 2513 F pulseaudio
Date: Thu May 7 09:32:33 2015
HibernationDevice: RESUME=UUID=4083aed8-20c6-481f-8a0d-f43f7f15131b
InstallationDate: Installed on 2015-05-01 (5 days ago)
InstallationMedia: Ubuntu 15.04 Vivid Vervet - Release amd64 (20150422)
MachineType: FUJITSU LIFEBOOK A544
ProcEnviron:
- LANGUAGE=en_GB:en
- TERM=xterm
- PATH=(custom, no user)
- LANG=en_GB.UTF-8
- SHELL=/bin/bash
+ LANGUAGE=en_GB:en
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=en_GB.UTF-8
+ SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic.efi.signed
root=UUID=de8c8d39-7ff8-49e5-b4ff-3bb08f1bf5ce ro noprompt quiet splash
intel_pstate=disable vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
- linux-restricted-modules-3.19.0-16-generic N/A
- linux-backports-modules-3.19.0-16-generic N/A
- linux-firmware 1.143
+ linux-restricted-modules-3.19.0-16-generic N/A
+ linux-backports-modules-3.19.0-16-generic N/A
+ linux-firmware 1.143
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2013
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.10
dmi.board.name: FJNBB35
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.modalias:
dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.10:bd10/03/2013:svnFUJITSU:pnLIFEBOOKA544:pvr:rvnFUJITSU:rnFJNBB35:rvr:cvnFUJITSU:ct10:cvr:
dmi.product.name: LIFEBOOK A544
dmi.sys.vendor: FUJITSU
** Changed in: linux (Ubuntu)
Importance: Undecided = Low
** Changed in: linux (Ubuntu)
Status: Confirmed = Incomplete
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https://bugs.launchpad.net/bugs/1452614
Title:
Kworker using 100% CPU
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