Upgrade from 16.04.5 LTS to 18.04 fails on some items

[udippel]

Did the apt-get update immediately before the offered upgrade to 18.04.

Went through smoothly until around 98%, when it stated that the update could not be completed and the system might be unstable. It would do some 'configure -a' (if memory serves right), and informed that it could not roll back. Then the upgrade process exited. Then - before manual reboot - I was offered two new updates: movieeditor and feh. I accepted, but stopped when it wanted to remove libcal3, systemd-shim and virtualbox.
Luckily, after reboot, it came up, but remains not upgradeable. It stops at an uninstallable systemd-shim. Any apt-get update doesn't help.

Observations throughout the upgrade process:
1. Early on, it had already popped up a message stating that systemd-shim could not be updated. Though then, I could continue, and did.
2. While doing the kernel update, it repeatedly warned 'no matching swap device is available'. I had/have no clue why, since I always had one, and have configured a partition as swap space.

Actions: I had accepted at all questions of replacing / keeping conf-s with 'replace'.

Now I'm looking forward to some help on completing the update, and removing the old packages (this also stops with systemd-shim).

[udippel (udippel)]

Sorry, forgot: it is kubuntu, amd64

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1787367/+editstatus and add the package name in the text box next to the word Package.

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[Brian Murray (brian-murray)]

Could you please add the log files from your upgrade, which are located in /var/log/dist-upgrade, to your bug report? Thanks in advance.

[udippel (udippel)]

This is the 'main' upgrade file, as per request.

[Brian Murray (brian-murray)]

I was actually looking for all of the log files. At a minimum apt-term.log would be helpful.

[udippel (udippel)]

Oh, of course! My excuses.