Public bug reported:
Ubuntu 18.04.4 with kernel 5.3.0-28-generic up to date @ 6/2/2020
Xscreensaver makes the system rise in high cpu load and high fan blowing
it always worked fine for years till recently this start to occur
tested both on gnome3 and openbox
tested a few screensavers, glmatrix, phosphor
after Xscreensaver launches getting alot of errors after a few minutes
like these:
[ 1599.969906] mce: CPU1: Core temperature above threshold, cpu clock throttled
(total events = 40)
[ 1599.969907] mce: CPU3: Core temperature above threshold, cpu clock throttled
(total events = 40)
[ 1599.969909] mce: CPU3: Package temperature above threshold, cpu clock
throttled (total events = 224)
to rule out its hardware related, i tested booting from grub with break=init
where the cpu stays 26c and no fans rise
i also tested Xscreensaver on 20.04 where this does not happen
disabling Xscreensaver keeps the system normal cpu & fan again
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xscreensaver 5.36-1ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-generic 5.3.13
Uname: Linux 5.3.0-28-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 6 11:19:28 2020
InstallationDate: Installed on 2019-05-18 (263 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: xscreensaver
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: xscreensaver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1862150
Title:
Xscreensaver produces high cpu and fan on 18.04
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