I was unable to recreate this today when performing an upgrade from Ubuntu 18.04 to Ubuntu 18.10. I did ensure that all updates were installed before I performed the upgrade between releases, something you may not have been forced to do as the ubuntu-release-upgrader change may not have landed the day you encountered this.
** Attachment added: "The dialog in question" https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1798656/+attachment/5205536/+files/20181025-bug1798656.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to debconf in Ubuntu. https://bugs.launchpad.net/bugs/1798656 Title: gtk3 frontend gives no widget for answering a boolean prompt Status in debconf package in Ubuntu: New Bug description: On upgrade from bionic to cosmic with update-manager, I was shown a debconf prompt about docker.io that asked: Automatically restart Docker daemon? There was no widget in the window that allowed me to select either yes or no. This is a grave deficiency in the default debconf frontend on the Ubuntu desktop. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1798656/+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