That log message is actually pretty common and probably not related to any freezes. To confirm this please open a Terminal window and start monitoring the log:
journalctl -f Now please check to see if the messages correlate closely with the freezes. And tell us if any of them appear when the freeze is *not* happening. ** Tags added: performance ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- 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/1876946 Title: gnome-shell freezing with "Attempting to run a JS callback during garbage collection." messages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1876946/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs