Public bug reported:
Upgrade from 18.04.5 to 20.04.1 fails.
/var/log/dist-upgrade/main.log shows:
2020-10-06 20:35:21,194 DEBUG Marking 'xubuntu-core' for upgrade
2020-10-06 20:35:21,349 WARNING Can't mark 'xubuntu-core' for upgrade (E:Unable
to correct problems, you have held broken packages.)
2020-10-06 20:35:21,349 DEBUG Marking 'xubuntu-desktop' for upgrade
2020-10-06 20:35:21,525 WARNING Can't mark 'xubuntu-desktop' for upgrade
(E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by
held packages.)
2020-10-06 20:35:21,526 DEBUG Marking 'ubuntu-mate-core' for upgrade
2020-10-06 20:35:21,666 WARNING Can't mark 'ubuntu-mate-core' for upgrade
(E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by
held packages.)
2020-10-06 20:35:21,667 DEBUG Marking 'ubuntu-mate-desktop' for upgrade
2020-10-06 20:35:21,809 WARNING Can't mark 'ubuntu-mate-desktop' for upgrade
(E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by
held packages.)
2020-10-06 20:35:51,326 ERROR Dist-upgrade failed: 'Broken packages after
upgrade: xubuntu-core, xubuntu-desktop'
Synaptic shows no broken packages.
$ sudo apt update --fix-missing
...All packages are up to date.
$ sudo apt install -f
...0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ dpkg --get-selections | grep hold
(returns nothing.)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
Uname: Linux 4.15.0-118-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: MATE
Date: Tue Oct 6 20:42:00 2020
InstallationDate: Installed on 2018-03-23 (928 days ago)
InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-07 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic dist-upgrade
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https://bugs.launchpad.net/bugs/1898815
Title:
Focal upgrade fails, can't mark packages for upgrade
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