That's just gnome-system-monitor and GTK-3 rendering inefficiently, which is bug 1773502 ...
Does your problem happen if you don't have gnome-system-monitor running? -- 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/1902825 Title: High CPU usage just moving the mouse To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1902825/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs