Hey, Could you please collect the stack traces of the kworker process while the issue happens?
1) Once it starts, get its PID (eg, 86069) and run: $ pid=86069; while sleep 1; do ts="$(date +'%F-%H-%M-%S')"; sudo cat /proc/$pid/stack > /tmp/stack.$pid.$ts; done 2) Once it stops, press ctrl-c to kill the collection, and run: $ tar cf /tmp/lp1896519-stacks.tar /tmp/stack.* And upload the tar file to this LP bug. Thanks, Mauricio -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1896519 Title: kworker consumes 80% of CPU Status in linux package in Ubuntu: Confirmed Bug description: Like yesterday I have noticed my CPU on Leonovo Thinkpad T590 laptop has starting to be consumed by kworker for 80% of 2-CPU 4-core processor. I also see fan works like crazy and "ejects" hot air non stop. This has never happened in my 6 months of having this new laptop. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-47-generic 5.4.0-47.51 ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55 Uname: Linux 5.4.0-47-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.8 Architecture: amd64 CasperMD5CheckResult: skip Date: Mon Sep 21 19:29:32 2020 InstallationDate: Installed on 2019-10-23 (334 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) MachineType: LENOVO 20N4S06V00 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-47-generic root=UUID=5ae35a7d-8195-4867-8bb5-49ab3106da83 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-47-generic N/A linux-backports-modules-5.4.0-47-generic N/A linux-firmware 1.187.3 SourcePackage: linux UpgradeStatus: Upgraded to focal on 2020-08-14 (38 days ago) dmi.bios.date: 08/12/2020 dmi.bios.vendor: LENOVO dmi.bios.version: N2IET91W (1.69 ) dmi.board.asset.tag: Not Available dmi.board.name: 20N4S06V00 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN2IET91W(1.69):bd08/12/2020:svnLENOVO:pn20N4S06V00:pvrThinkPadT590:rvnLENOVO:rn20N4S06V00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T590 dmi.product.name: 20N4S06V00 dmi.product.sku: LENOVO_MT_20N4_BU_Think_FM_ThinkPad T590 dmi.product.version: ThinkPad T590 dmi.sys.vendor: LENOVO modified.conffile..etc.default.apport: # set this to 0 to disable apport, or to 1 to enable it # you can temporarily override this with # sudo service apport start force_start=1 enabled=0 mtime.conffile..etc.default.apport: 2020-04-29T17:08:03.553351 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1896519/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
