Ubuntu abolished the notification area in 2011, in favor of application indicators, and reviving it would be a regression. <https://design.canonical.com/2010/04/notification-area/>
Transmission and hplip both adopted application indicators years ago, so there is no need to show the notification area for their sake. ** Changed in: gnome-shell-extension-appindicator (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1713551 Title: System tray (notification area) icons are not shown on unity-session and gnome-classic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1713551/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs