Wow, yes. That is unusual. Multiple threads exist in gnome-shell but they're pretty well hidden from the main code, mostly handling asynchronous IO etc...
Next we need to see more information about the machine. Please run this command to send it automatically: apport-collect 1850874 ** No longer affects: mutter (Ubuntu) -- 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/1850874 Title: gnome-shell 100% CPU usage on all cores when animated gif is displayed Status in gnome-shell package in Ubuntu: Incomplete Bug description: This started to happen with Ubuntu 19.10. When an animated gif is displayed in a browser, gnome-shell begins using 100% CPU on all cores. To reproduce: 1) open Firefox, or Chromium 2) load an URL where an animated gif is displayed - you can also use this direct link to https://i.stack.imgur.com/h6viz.gif 3) gnome-shell will start using 100% CPU on all cores (as long as Firefox/Chromium window is in the foreground) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1850874/+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
