Now it's becoming interesting and really confusing. I had some time to dig through a little. Looks like that update-notifier can be configured through gsettings/dconf-editor (see the related attached screenshot). So, update-manager has nothing to do with notifications but it's update- notifier which runs update-manager.
There is no way to configure update-notifier through it's own GUI and at the same time update-manager's settings are ignored by update-notifier. ** Attachment added: "dconf settings for update-notifier: no-show-notifications" https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1817559/+attachment/5242438/+files/software_updater_notifier_notifications.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817559 Title: update-notifier ignores update-manager's settings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1817559/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs