Public bug reported:
After updating via apt dist-upgrade from kernel 5.4.0-59 to kernel
5.8.0-34 the fan on my machine started switching on (for an instant) and
off every 10 seconds even when idle with CPU at 48/50°C.
Switching back to previous kernel solves temporary the problem, i.e.
fans are always off with light desktop work.
The new behavior is really annoying and I guess not healthy for the
fans.
I'm on latest Dell bios, with every other package updated.
Di something in the thermal policies change between those two kernels?
Is it possible to go back to previous behavior ?
Thanks in advance for help
Machine: Dell Precison 7540, intel i7-9750
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-34-generic 5.8.0-34.37~20.04.2
ProcVersionSignature: Ubuntu 5.8.0-34.37~20.04.2-generic 5.8.18
Uname: Linux 5.8.0-34-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 7 17:14:54 2021
InstallationDate: Installed on 2020-05-06 (246 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: linux-signed-hwe-5.8
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe-5.8 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dell fan focal thermal
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https://bugs.launchpad.net/bugs/1910562
Title:
Fans switching on and off every 10 seconds after update to kernel
5.8.0-34
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