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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1850874 Title: gnome-shell 100% CPU usage on all cores when animated gif is displayed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1850874/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
