Did you manually run unattended-upgrade? Its supposed to be run as part of cron which updates the package lists and then calls unattended- upgrade. See /usr/lib/apt/apt.systemd.daily for details.
** Changed in: unattended-upgrades (Ubuntu) Status: New => Incomplete -- 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/1603620 Title: Package lists are not updated before Unattended upgrades runs automatically. Status in unattended-upgrades package in Ubuntu: Incomplete Bug description: Newest kernel available currently is 4.4.0-31-generic, but $ linux-version list 4.2.0-38-generic 4.4.0-24-generic 4.4.0-28-generic `apt-get dist-upgrade` does not upgrade kernel either, unless I run `apt-get update` first. I wonder why kernel was not upgraded 2016-07-16 morning. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: unattended-upgrades 0.90 ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13 Uname: Linux 4.4.0-28-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: XFCE Date: Sat Jul 16 11:40:07 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2015-11-21 (237 days ago) InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) PackageArchitecture: all SourcePackage: unattended-upgrades UpgradeStatus: Upgraded to xenial on 2016-06-24 (21 days ago) modified.conffile..etc.apt.apt.conf.d.10periodic: APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Download-Upgradeable-Packages "0"; APT::Periodic::AutocleanInterval "0"; APT::Periodic::Unattended-Upgrade "0"; mtime.conffile..etc.apt.apt.conf.d.10periodic: 2016-02-15T22:39:19.560937 mtime.conffile..etc.apt.apt.conf.d.50unattended-upgrades: 2016-06-24T18:13:45.181749 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1603620/+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