Public bug reported: I don't know what happened, but I just sat down at my machine to find it sluggish. Digging further, I find that gnome-shell is spamming the system log with these messages:
May 13 12:06:42 cerberus gnome-shell[3120]: JS ERROR: TypeError: null has no properties _onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9 actionMoveWorkspace@resource:///org/gnome/shell/ui/windowManager.js:2170:23 _showWorkspaceSwitcher@resource:///org/gnome/shell/ui/windowManager.js:2144:18 Restarting the shell with: busctl --user call org.gnome.Shell /org/gnome/Shell org.gnome.Shell Eval s 'Meta.restart("Restarting…")' restored it to sanity. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-shell 3.36.7-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106 Uname: Linux 5.4.0-73-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.17 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu May 13 12:07:00 2021 DisplayManager: gdm3 InstallationDate: Installed on 2020-05-29 (348 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash RelatedPackageVersions: mutter-common 3.36.7+git20201123-0.20.04.1 SourcePackage: gnome-shell UpgradeStatus: Upgraded to focal on 2020-11-04 (190 days ago) ** Affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1928358 Title: gnome-shell spamming the log To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1928358/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs