Public bug reported: While running an upgrade, we see errors of the form
apt: unknown dependency error This is very similar to the error in lp:1668583 and using "Request upgrade" which runs dist-upgrade does allow upgrades to complete. Looking for sources in backports does not throw up anything. $ for in in $(COLUMNS=200 dpkg -l | awk '{print $2}') do apt-cache policy $i | awk '/500 http/ { print $3 }' done | sort -u stable/main xenial/main xenial/multiverse xenial/restricted xenial-security/main xenial-security/multiverse xenial-security/restricted xenial-security/universe xenial/universe xenial-updates/main xenial-updates/multiverse xenial-updates/pike/main xenial-updates/restricted xenial-updates/universe $ lsb_release -rd Description: Ubuntu 16.04.6 LTS Release: 16.04 $ apt policy landscape-client landscape-client: Installed: 17.03~bzr940-0~941~ubuntu16.04.1 Candidate: 17.03~bzr940-0~941~ubuntu16.04.1 Version table: *** 17.03~bzr940-0~941~ubuntu16.04.1 500 500 http://ppa.launchpad.net/landscape/17.03/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status 16.03-0ubuntu2.16.04.6 500 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 16.03-0ubuntu2 500 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages ** Affects: landscape-client (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1819822 Title: upgrades fail with errors of the form apt: unknown dependency error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/landscape-client/+bug/1819822/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs