I'm really sorry but I have failed to re-create the bug on my own system. As I didn't discover the problem for at least a month, I can't remember exactly when it occurred or what I did to make it happen. I do remember that after the first attempt to upgrade, there was a problem with using the "revert" button on the Software Sources application, which re-enabled all the Artful sources even though I hadn't upgraded - so I had to manually alter the /etc/apt/sources.list to go back to Zesty. I'm pretty sure that I would have enabled all the Zesty sources including updates, as the sources.list is not that complicated.
However I can't tell you how this happened, so regrettably I think I have to withdraw the bug report (or at least ask you to do so). I apologise for wasting your time on this one. ** Attachment added: "/etc/apt/sources.list" https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1737445/+attachment/5023303/+files/sources.list -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1737445 Title: release upgrader doesn't re-enable updates after failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1737445/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
