The exact same bug occurred to me when updating from 12.04 to 12.10. On my machine also /etc/cron.daily/apt is not set executable.
So, I think, unfortunately the bug still exists?! ** Changed in: update-notifier (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/390319 Title: Ubuntu does not automatically check for updates, even when set to To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/390319/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs