Thanks for your reply. It's great that you've got a clone - presumably even though I can't reproduce the issue, you can?
Could you please clone again, but perform a few steps differently this time? This will help diagnose the issue. First, I don't understand what the changelog is in less at all. Please could you describe everything you see around that in more detail? Have you installed any kind of addon or modification that might affect the upgrade process? Then, from a clone to reproduce the problem, please run "dpkg-query -W postfix" to give me the version number you're upgrading from. Next, please install the "debconf-tools" package (before upgrading), then run "debconf-get-selections|grep postfix" and paste the output of that here. Then, to upgrade, run "sudo DEBIAN_FRONTEND=text apt-get upgrade" instead. This will show you the prompt without full screen mode, which will allow you to copy and paste the output more easily. Please try and capture the output of absolutely everything and attach it to this bug. Please don't skip any output - it may be important. To eliminate the less command to make it easier to capture that, you might try "sudo DEBIAN_FRONTEND=text PAGER=cat apt-get upgrade". I'm not sure what the less invocation is, but this might eliminate it. Setting Incomplete again - please change to New when done (this is to clear it from the triage queue so that it pops up again when the bug needs attention). ** Changed in: postfix (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in Ubuntu. https://bugs.launchpad.net/bugs/1169044 Title: can't install/upgrade postfix non interactively through apt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1169044/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs