Thanks for all that. It appears the main CPU hog here is bug 1849142, which has a fix coming soon. So to exclude that bug and see if it is the main problem, please:
1. Open the Extensions app 2. Disable 'Ubuntu AppIndicators' 3. Reboot. 4. If the problem happens after that then please again run: apport-collect 1900760 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1900760 Title: gnome-shell very high %CPU usage while moving mouse on Ubuntu 20.04 Status in gnome-shell package in Ubuntu: Incomplete Bug description: After upgrade from 18.04 to 20.04 I discovered that gnome-shell occasionally starts eating up unreasonably large CPU %. After some head scratching why on earth i thappens, it was clear that moving my mouse energetically I can get it as close to 100% as I want. If this is relevant, the mouse model is Corsair Harpoon wireless BT. I am reading some speculation that the cause of the problem is high polling rate for mouse location (?). It is suggested in this bug entry (https://bugs.launchpad.net/bugs/1848951) that this issue is fixed on late march. But this is october and I still experience this problem on an updated PC. gnome-shell version on my system: 3.36.4-1ubuntu1~20.04.2 --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.9 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2018-08-18 (794 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) NonfreeKernelModules: lkp_Ubuntu_5_4_0_48_52_generic_72 nvidia_modeset nvidia Package: gnome-shell 3.36.4-1ubuntu1~20.04.2 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60 RelatedPackageVersions: mutter-common 3.36.6-1ubuntu0.20.04.2 Tags: focal Uname: Linux 5.4.0-48-generic x86_64 UpgradeStatus: Upgraded to focal on 2020-10-04 (16 days ago) UserGroups: adm cdrom dialout dip docker kvm lpadmin plugdev sambashare sudo vboxusers _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1900760/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp