Comment 3 for bug 2044614

I managed to upgrade to mantic by removing all packages labeled as "broken" in /var/log/dist-upgrade/apt.log and reinstalling them (+ all packages that were removed because they depended on removed packages) after the upgrade. A few packages don't seem to exist in mantic anymore, so I skipped them (mostly around video encoding).

Unfortunately, this lead to 40 packages to be temporarily removed, including `gnome-shell`, so I didn't have a graphical user interface after the release upgrade. From an end-user's perspective, this is a really unfortunate situation, in particular because it's hard to understand why manual intervention is necessary here at all. Once I believed I had roughly figured out what the text in the log files meant, everything else was purely mechanical: extract the names of the packages that were identified as "broken", remove them, record the transitively removed packages, upgrade, and then reinstall the removed packages that were still available in the new release. Maybe ubuntu-release-upgrader could at least have proposed to do this for me.