It looks like SOLVED my issue. I found a crash report in /var/crash which is created by upgrade process.
Once I delete this crash report from /var/crash, error dialog and related syslog output that I reported no longer occur. I'm not very sure that my case was the same as originally reported issue. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell-extension-appindicator in Ubuntu. https://bugs.launchpad.net/bugs/1825623 Title: [AppIndicatorSupport-FATAL] unable to update overlay icon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-appindicator/+bug/1825623/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs