you are right, Julian, I am sorry. The behaviour has not changed at all compared to previous ubuntu releases.
In my case there was the dpkg inconsistency, requiring execution of 'dpkg --configure -a' But at the same time there was some dependency problem which required calling 'apt -f install' The latter made 'apt check' error out, but I attributed this to the former. ** Changed in: apt (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1731636 Title: daily unattended upgrade does not recover from interrupted dpkg run (regression) Status in apt package in Ubuntu: Invalid Bug description: ever since the daily unattended upgrade is run via systemd timers it does no longer recover from interrupted dpkg runs in /usr/lib/apt/apt.systemd.daily, before the actual unattended-upgrade script is called, there is a call to apt-get check which ends the daily update run with an error in this case. The log says error encountered in cron job with "apt-get check". Before the switch to systemd timers, when a dpkg run was interrupted (requiring execution of dpkg --configure -a), the unattended upgrade script would recover from this (unless Unattended- Upgrade::AutoFixInterruptedDpkg was set to "false"). So this is a regression. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: apt 1.2.24 ProcVersionSignature: Ubuntu 4.10.0-35.39~16.04.1-generic 4.10.17 Uname: Linux 4.10.0-35-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 CurrentDesktop: XFCE Date: Sat Nov 11 15:49:14 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2016-05-05 (554 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) SourcePackage: apt UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1731636/+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