I have Ubuntu 18.04 installed on my laptop and was trying to upgrade to 20.04. After disabling PPA sources and running the upgrade tool, I receive the "Could not calculate the upgrade" error.
The logs for Broken packages from /var/log/dist-upgrade/apt.log are available here. There seems to be +200 packages with conflicts including very important ones like python, so removing all of them as proposed in this answer is not an option. I have already tried apt remove and apt autoremove and removing 3rd party apt sources and the whole nine yards.
Considering that I haven't used this laptop for too long, it is very strange that the automatic update is impossible. Are there any other ways to force the upgrade using the do-release-upgrade tool?
