found same problem on
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-29-generic 5.3.0-29.31
ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
Uname: Linux 5.3.0-29-generic x86_64
and
Linux corrado-HP-p4-ff--0124 5.4.0-12-generic #15-Ubuntu SMP Tue Jan 21 
15:12:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861419

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https://bugs.launchpad.net/bugs/1861419

Title:
  kworker takes a lot of CPU

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  kworker takes a lot of CPU. no other app are active.

  top - 15:52:50 up 8 min,  1 user,  load average: 1,16, 1,24, 0,77
  Tasks: 204 total,   2 running, 202 sleeping,   0 stopped,   0 zombie
  %Cpu(s):  4,9 us, 26,2 sy,  0,0 ni, 62,3 id,  0,0 wa,  0,0 hi,  6,6 si,  0,0 
st
  MiB Mem :   3867,1 total,   1737,2 free,    895,9 used,   1234,0 buff/cache
  MiB Swap:   4096,0 total,   4096,0 free,      0,0 used.   2568,5 avail Mem 

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
    239 root      20   0       0      0      0 R  81,2   0,0   0:31.92 
kworker/0+
   1623 corrado   20   0  304848  53436  38048 S   6,2   1,3   0:13.02 Xorg
   1921 corrado   20   0  323484  10544   8768 S   6,2   0,3   0:00.42 
ibus-daem+
      1 root      20   0  167140  10868   7952 S   0,0   0,3   0:02.04 systemd

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: linux-image-5.3.0-29-generic 5.3.0-29.31
  ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
  Uname: Linux 5.3.0-29-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  corrado    1613 F.... pulseaudio
   /dev/snd/controlC1:  corrado    1613 F.... pulseaudio
  Date: Thu Jan 30 15:49:01 2020
  InstallationDate: Installed on 2019-12-28 (33 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: Hewlett-Packard HP 250 G3 Notebook PC
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-29-generic 
root=UUID=24e2ba6f-1b75-4b3c-835e-63387635551b ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.3.0-29-generic N/A
   linux-backports-modules-5.3.0-29-generic  N/A
   linux-firmware                            1.183.3
  RfKill:
   0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2014
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.36
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 2211
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 86.49
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsyde:bvrF.36:bd12/18/2014:svnHewlett-Packard:pnHP250G3NotebookPC:pvr0991100000000000000600087:rvnHewlett-Packard:rn2211:rvr86.49:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.family: 103C_5336AN G=N L=CON B=HP S=PAV
  dmi.product.name: HP 250 G3 Notebook PC
  dmi.product.sku: J4R70EA#ABZ
  dmi.product.version: 0991100000000000000600087
  dmi.sys.vendor: Hewlett-Packard

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