There seems to be an issue with the kernel module tps6598x which puts the CPU on a high load: https://forums.intel.com/s/question/0D50P00004fWnUeSAK/nuc10i3-irq-problem
As soon as the module is unloaded, cpu load is back to normal.
According to a post in the link above the issue is the following:
"My guess is that the IRQ resource is not correct for the PD
controller causing you to see irq flood.
The problem is that the ACPI device entry (the node) on this platform
has 4 I2CSerialBus resources and 4 IRQ resources. The idea is that the
single ACPI device entry can represent up to 4 USB PD controllers. The
problem is that there is no way to know which IRQ resource belongs to
which I2CSerialBus resource :-(.
Andy, this is one of those multi-instantiate I2C slave devices with
HID INT3515.
The only solution I can think of is that we start maintaining DMI
quirk table in drivers/platform/x86/i2c-multi-instantiate.c where we
supply the correct i2c to irq resource mapping for every platform
that has this device(s)."
Description: Ubuntu 20.04 LTS
Release: 20.04
Hardware: Intel NUC10i5FNK
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-37-generic 5.4.0-37.41
ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
Uname: Linux 5.4.0-37-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-37-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D10p', '/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
CasperMD5CheckResult: pass
Date: Mon Jun 15 11:04:57 2020
InstallationDate: Installed on 2020-04-26 (49 days ago)
InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Intel(R) Client Systems NUC10i5FNK
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-37-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro
RelatedPackageVersions:
linux-restricted-modules-5.4.0-37-generic N/A
linux-backports-modules-5.4.0-37-generic N/A
linux-firmware 1.187
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/18/2020
dmi.bios.vendor: Intel Corp.
dmi.bios.version: FNCML357.0041.2020.0518.1045
dmi.board.asset.tag: Default string
dmi.board.name: NUC10i5FNB
dmi.board.vendor: Intel Corporation
dmi.board.version: K61361-302
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 35
dmi.chassis.vendor: Intel Corporation
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnIntelCorp.:bvrFNCML357.0041.2020.0518.1045:bd05/18/2020:svnIntel(R)ClientSystems:pnNUC10i5FNK:pvrK61339-302:rvnIntelCorporation:rnNUC10i5FNB:rvrK61361-302:cvnIntelCorporation:ct35:cvr2.0:
dmi.product.family: FN
dmi.product.name: NUC10i5FNK
dmi.product.sku: BXNUC10i5FNK
dmi.product.version: K61339-302
dmi.sys.vendor: Intel(R) Client Systems
This change was made by a bot.