I manage to figure out what was wrong. I found out that snapd had stuck on auto-refresh "core", (ran sudo snap changes). It was stuck since yesterday. Thus the lxd snap broke when installed.
What I did to fix it. * Aborted the autorefresh (sudo snap abort <id>) * stopped the snapd service (had to kill all the snapd processes) * started snapd again The first time when snapd restarted, it got stuck again. Once again... * Aborted the autorefresh (sudo snap abort <id>) * stopped the snapd service (had to kill all the snapd processes) * started snapd again * Ran sudo snap connect lxd:lxd-support core:lxd-support (to fix the broken lxd snap) Then I ran apt-get install lxd again... and it got stuck, could not terminate the previous lxd service. * Had to force reboot the computer. After a restart. Ran apt-get install lxd again and everything worked as expected. To continue continue the upgrade, I ran sudo apt upgrade. Now everything is OK So, summary. If the snap auto-refresh of "core" is stuck. The upgrade will fail. Maybe a pre-check that the "core" snap is enabled before starting the release-upgrade (at least if lxd is installed)? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874878 Title: Did a "do-release-upgrade" from 18.04 to 20.04 and got an error message To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1874878/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
