A bit of investigation has been done here: https://discourse.ubuntu.com/t/update-manager-never-popping-up/85177/2
Looks like the culprit is update-notifier which does not send any notification if no tray icon is displayed... meanwhile tray icon is off by default in Ubuntu (gsettings set com.ubuntu.update-notifier show- updates-status-icon false). Test : 1) Make sure updates are pending /usr/lib/update-notifier/apt-check 2) Make sure notification is sent immediately (otherwise you have to check time conditions for the test to work) gsettings set com.ubuntu.update-notifier regular-auto-launch-interval 0 3) Launch update-notifier with icon enabled killall update-notifier gsettings set com.ubuntu.update-notifier show-updates-status-icon true update-notifier >>> You get both icon & notification 4) Launch update-notifier with icon disabled killall update-notifier gsettings set com.ubuntu.update-notifier show-updates-status-icon false update-notifier >>> You get neither icon nor notification -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2159587 Title: Update-notifier does not send notifications by default (nor open update-manager) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/2159587/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
