Public bug reported:
Randomly, system freezes with high CPU usage (cooling fan goes high when
the problem happens) since update to Ubuntu 20.04.1 LTS.
Same problem with X11 and Wayland.
Display freezes and keyboard or mouse inputs won't change anything.
Caps and num lock won't react either.
Ctrl+alt+anything doesn't solve the issue.
Only possibility is then to force reboot using power button.
After reboot, I could find in logs :
gnome-shell
libinput error: client bug: timer event6 debounce short: scheduled expiry is in
the past (-15ms), your system is too slow
Problem happens in any situation, for example while videoconferencing
with any software, or using LibreOffice Writer, sometimes with Firefox.
The only common fact seems to be that Firefox is always opened.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mutter 3.36.7+git20201123-0.20.04.1
ProcVersionSignature: Ubuntu 5.8.0-38.43~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-38-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan 20 10:27:48 2021
InstallationDate: Installed on 2020-11-15 (65 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fr_FR.UTF-8
SHELL=/bin/bash
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal wayland-session
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https://bugs.launchpad.net/bugs/1912472
Title:
Display freezes randomly - high CPU usage
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