In my tests i found u-u operating properly on shutdown except when the system was started on battery, and in that case the u-u.service did not start - thus did not stop on shutdown:
$ service unattended-upgrades status ● unattended-upgrades.service - Unattended Upgrades Shutdown Loaded: loaded (/lib/systemd/system/unattended-upgrades.service; enabled; vendor preset: enabled) Active: inactive (dead) Condition: start condition failed at Fri 2018-05-25 20:18:34 UTC; 38s ago └─ ConditionACPower=true was not met Docs: man:unattended-upgrade(8) The change to not run on battery was introduced in 0.97, right before Artful's release. Did you start your system on battery? ** Changed in: unattended-upgrades (Ubuntu) Status: New => Triaged ** Changed in: unattended-upgrades (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unattended-upgrades in Ubuntu. https://bugs.launchpad.net/bugs/1773033 Title: unattended upgrade no longer actions on shutdown Status in unattended-upgrades package in Ubuntu: Triaged Bug description: Ubuntu 17.10 and 18.04 do not install updates with InstallOnShutdown flag set. post-install script on 14.04 and 16.04 would set options in /etc/apt/apt.conf.d/50unattended-upgrades and /etc/apt/apt.conf.d/10periodic to install updates on shutdown of ubuntu desktop. This worked on 17.10 also, until an update before the release of 18.04. After a fresh install of 18.04, ran the post install script. Below is the contents of the two files, updates do not run, even if performing an apt update and leaving the machine up for a few hours to download packages in the back ground. Both the unattended- upgrades and unattended-upgrades-shutdown log files are empty. Description: Ubuntu 18.04 LTS Release: 18.04 ii unattended-upgrades 1.1ubuntu1 all automatic installation of security upgrades ----------------------/etc/apt/apt.conf.d/50unattended-upgrades---------------- Unattended-Upgrade::Allowed-Origins { "${distro_id}:${distro_codename}"; "${distro_id}:${distro_codename}-security"; // Extended Security Maintenance; doesn't necessarily exist for // every release and this system may not have it installed, but if // available, the policy for updates is such that unattended-upgrades // should also install from here by default. "${distro_id}ESM:${distro_codename}"; "${distro_id}:${distro_codename}-updates"; // "${distro_id}:${distro_codename}-proposed"; // "${distro_id}:${distro_codename}-backports"; "LP-PPA-libreoffice:${distro_codename}"; "Canonical:${distro_codename}"; }; Unattended-Upgrade::Package-Blacklist { // "vim"; // "libc6"; // "libc6-dev"; // "libc6-i686"; }; Unattended-Upgrade::DevRelease "false"; Unattended-Upgrade::InstallOnShutdown "true"; Unattended-Upgrade::Remove-Unused-Dependencies "true"; ---------/etc/apt/apt.conf.d/10periodic:---------------------- APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Download-Upgradeable-Packages "1"; APT::Periodic::AutocleanInterval "7"; APT::Periodic::Unattended-Upgrade "1"; To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1773033/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp