*** This bug is a duplicate of bug 1871262 *** https://bugs.launchpad.net/bugs/1871262
Thanks. The only relevant information I can find in there is: Nov 06 05:44:28 Sable-Complete gnome-shell[18366]: meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0' failed -- 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/1902969 Title: desktop freezes when changing thundebird win decorations To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1902969/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs