 If unsure about whether or not you should file a bug, it's probably best to file the bug & just add that you were unsure if it's a concern (and don't be worried if it gets filed as closed/invalid etc). 
 File with ubuntu-bug ubuntu-release-upgrader and follow the prompts, login etc.  https://help.ubuntu.com/community/ReportingBugs (re @Willem: Hi all.
 I am testing Ubuntu 22.04 and xubuntu 22.04.
 On my dual boot laptop I've upgraded both Ubuntu 21.10 and xubuntu 21.10 to 22.04. 
 The upgrade "went wrong" in both distro's in the same way and on the same place in the upgrade process (the desktop disappears suddenly in the middle of the upgrade, a black screen appears with only a blinking cursor, can't switch to a different tty) I managed to finish the upgrade in both cases by doing "sudo dpkg --configure -a" and other commands. 
 Both distro's are fully upgraded and working well now.
 Question: should I report the upgrade issue I ran into? If so where? And what logs should I be looking at to find out more about the problem?
 Thank you.)
 https://linuxunplugged.com/449 last weeks Ubuntu Bug hunt week mentioned
 Thank you.
 I'll get to it later today. (re @guiverc: If unsure about whether or not you should file a bug, it's probably best to file the bug & just add that you were unsure if it's a concern (and don't be worried if it gets filed as closed/invalid etc). 
 File with ubuntu-bug ubuntu-release-upgrader and follow the prompts, login etc.  https://help.ubuntu.com/community/ReportingBugs)