update-manager repeatedly asks for partial upgrade

[Allan W. Macdonald]

Ubuntu 16.04 LTS

The GUI application, update-manager, repeatedly asks for a partial upgrade when no such upgrade exists using apt or apt-get.

For more information, see this forum topic:

https://ubuntuforums.org/showthread.php?t=2411297&p=13833926

$ apt-cache policy update-manager
update-manager:
  Installed: 1:16.04.15
  Candidate: 1:16.04.15
  Version table:
 *** 1:16.04.15 500
        500 http://ca.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://ca.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1:16.04.12 500
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages
     1:16.04.3 500
        500 http://ca.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        500 http://ca.archive.ubuntu.com/ubuntu xenial/main i386 Packages

[Yuri Weinstein (yuri-weinstein)]

I see the same problem, see https://ubuntuforums.org/showthread.php?t=2411319&page=2&p=13834468#post13834468

apt-cache policy update-manager
update-manager:
  Installed: 1:16.04.15
  Candidate: 1:16.04.15
  Version table:
 *** 1:16.04.15 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1:16.04.12 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu xenial-security/main i386 Packages
     1:16.04.3 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Allan W. Macdonald (allan-w-macdonald)]

The problem still exists after do-release-upgrade to 18.04.2 LTS.