kworker/0:2+kacpid is using around 80% of CPU

[Mark Muller]

Xorg using up a CPU core almost all the time. That CPU core (thread/core 0) runs idle at 70+ degrees. This didn't happen before and is definitely a bug. I tried switching Nvidia PRIME profiles. (read some former issue online) But it didn't help.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 6.2.0-27.28-generic 6.2.15
Uname: Linux 6.2.0-27-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.gpus.0000.01.00.0: Error: path was not a regular file.
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 535.86.05 Fri Jul 14 20:46:33 UTC 2023
 GCC version: gcc version 12.3.0 (Ubuntu 12.3.0-1ubuntu1~23.04)
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Toegang geweigerd: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 16 11:15:15 2023
DistUpgraded: 2023-04-21 21:42:30,506 DEBUG icon theme changed, re-reading
DistroCodename: lunar
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation CometLake-H GT2 [UHD Graphics] [8086:9bc4] (rev 05) (prog-if 00 [VGA controller])
   Subsystem: CLEVO/KAPOK Computer CometLake-H GT2 [UHD Graphics] [1558:50d3]
 NVIDIA Corporation TU106M [GeForce RTX 2070 Mobile / Max-Q Refresh] [10de:1f14] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: CLEVO/KAPOK Computer TU106M [GeForce RTX 2070 Mobile / Max-Q Refresh] [1558:50d3]
InstallationDate: Installed on 2021-11-10 (643 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
MachineType: Notebook PCX0DX
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-27-generic root=UUID=8a83d0db-9607-4202-a18b-0b9c68a157bf ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to lunar on 2023-04-21 (116 days ago)
dmi.bios.date: 06/22/2020
dmi.bios.release: 7.7
dmi.bios.vendor: INSYDE Corp.
dmi.bios.version: 1.07.07N
dmi.board.asset.tag: Tag 12345
dmi.board.name: PCX0DX
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.ec.firmware.release: 7.2
dmi.modalias: dmi:bvnINSYDECorp.:bvr1.07.07N:bd06/22/2020:br7.7:efr7.2:svnNotebook:pnPCX0DX:pvrNotApplicable:rvnNotebook:rnPCX0DX:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:skuNotApplicable:
dmi.product.family: Not Applicable
dmi.product.name: PCX0DX
dmi.product.sku: Not Applicable
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.114-1
version.libgl1-mesa-dri: libgl1-mesa-dri 23.0.4-0ubuntu1~23.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.7-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report. Please try using 'top', 'xrestop' and 'nvidia-smi' to find out which process is triggering Xorg to use high CPU.

[Mark Muller (mull0r)]

Dear Daniel / Beste Daniel,

top command shows: kworker/0:2+kacpid  is using around 80% of CPU
(core?) all the time.

I couldn't really find anything helpful with xrestop or nvidia-smi
commands. Maybe with a little bit more help/guidance.

I'm on a laptop by the way

Groet,

Mark Muller
Euphoria Erotiek B.V.
https://euphoria-erotiek.nl
Heerenveen | Leeuwarden

Op 16-08-2023 om 11:32 schreef Daniel van Vugt:
> Thanks for the bug report. Please try using 'top', 'xrestop' and
> 'nvidia-smi' to find out which process is triggering Xorg to use high
> CPU.
>
> ** Package changed: xorg (Ubuntu) => ubuntu
>
> ** Changed in: ubuntu
> Status: New => Incomplete
>

[Mark Muller (mull0r)]

This helped:
https://unix.stackexchange.com/questions/588018/kworker-thread-kacpid-notify-kacpid-hogging-60-70-of-cpu

So I disabled gpe6F in my case. Finally a silent laptop.

Groet,

Mark Muller
Euphoria Erotiek B.V.
https://euphoria-erotiek.nl
Heerenveen | Leeuwarden

Op 16-08-2023 om 16:05 schreef Mark Muller:
> Dear Daniel / Beste Daniel,
>
> top command shows: kworker/0:2+kacpid  is using around 80% of CPU
> (core?) all the time.
>
> I couldn't really find anything helpful with xrestop or nvidia-smi
> commands. Maybe with a little bit more help/guidance.
>
> I'm on a laptop by the way
>
> Groet,
>
> Mark Muller
> Euphoria Erotiek B.V.
> https://euphoria-erotiek.nl
> Heerenveen | Leeuwarden
>
> Op 16-08-2023 om 11:32 schreef Daniel van Vugt:
>> Thanks for the bug report. Please try using 'top', 'xrestop' and
>> 'nvidia-smi' to find out which process is triggering Xorg to use high
>> CPU.
>>
>> ** Package changed: xorg (Ubuntu) => ubuntu
>>
>> ** Changed in: ubuntu
>>         Status: New => Incomplete
>>

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.