Michael, I have fixed the problem. For some unknown reason my user has been removed from the "admin" group during a dist-upgrade! I have joined the group back, and now update-manager notification is working fine!
Closing the bug. Thanks Fabio ** Changed in: update-notifier (Ubuntu) Status: Needs Info => Rejected -- update-manager doesn't detect updates available https://launchpad.net/bugs/94078 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs