Thanks for the bug report. In your video I can see two causes that are not really bugs:
* Firefox using CPU at the same time as gnome-shell means it is Firefox causing the persistent CPU usage in gnome-shell. Make sure Firefox isn't displaying animations like web ads. Even if that doesn't look like the problem, it's still Firefox's fault if the problem is correlated with that app running. * Triggering the window spread animation causes even higher gnome-shell CPU usage. This is normal and not a bug. Although we welcome patches to make it more efficient. Suggested workaround: Make Firefox render more efficiently by adding MOZ_ENABLE_WAYLAND=1 to /etc/environment and then reboot. Also don't leave any browser tabs open that you don't need. ** Changed in: gnome-shell (Ubuntu) Status: New => Opinion -- 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/1999578 Title: Bursts of high CPU usage after triggering overview To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1999578/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs