i think the recent upgrade changed the dependency of update-manager, update-manager-core and update-notifier. for me, i upgraded update-manager-core and it automatically removed update-manager, ubuntu-desktop and update-notifier, so i dont have the notifier now when i boot up or use apt-get update/upgrade etc.
this problem should be related with broken dependency. ** Also affects: update-notifier (Ubuntu) Importance: Undecided Status: New ** Also affects: update-manager-core (Ubuntu) Importance: Undecided Status: New -- update-manager will not work/ reinstall https://bugs.launchpad.net/bugs/220569 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs