Yes, it is a virtual machine (and hence 3 CPUs!) - though it didn't show these symptoms with Ubuntu 19.04 (noticed by laptop fans going on as soon as I visit a page with animated gifs, i.e. showing build status and such).
There are no gnome extensions installed. ** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1850874/+attachment/5301944/+files/dmesg.txt -- 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
