Ubuntu
ubuntu-release-upgrader package

Upgrade from bionic LTS to focal LTS fails because of "pkgProblemResolver::Resolve generated breaks"

Bug #1894967 reported by Bernd Porr on 2020-09-09

6

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	ubuntu-release-upgrader (Ubuntu)	New	Undecided	Unassigned

Bug Description

main.log gives this error:

2020-09-09 10:15:03,237 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'

however, there is no hint in the log files what that might be. I have a few PPAs but none of them are flagged up in the log files. Neither apt.log nor mail.log.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 5.4.0-47.51~18.04.1-generic 5.4.55
Uname: Linux 5.4.0-47-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Sep 9 10:18:29 2020
InstallationDate: Installed on 2014-08-18 (2213 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-09-09 (0 days ago)

Tags:

Revision history for this message

Bernd Porr (berndporr) wrote on 2020-09-09:

#1

CurrentDmesg.txt.txt Edit (83.3 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (2.4 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1012 bytes, text/plain; charset="utf-8")
ProcEnviron.txt Edit (115 bytes, text/plain; charset="utf-8")
VarLogDistupgradeAptclonesystemstate.tar.gz Edit (1.6 MiB, application/x-gzip)
VarLogDistupgradeAptlog.txt Edit (211.5 KiB, text/plain; charset="utf-8")
VarLogDistupgradeLspcitxt.txt Edit (6.5 KiB, text/plain; charset="utf-8")
VarLogDistupgradeMainlog.txt Edit (18.7 KiB, text/plain; charset="utf-8")
VarLogDistupgradeScreenlog.txt Edit (1.1 MiB, text/plain; charset="utf-8")

Revision history for this message

Bernd Porr (berndporr) wrote on 2020-09-09:

#2

apt.log from the most recent dist upgrade attempt Edit (211.5 KiB, text/plain)

Revision history for this message

Bernd Porr (berndporr) wrote on 2020-09-09:

#3

the main log from the most recent dist upgrade attempt Edit (18.7 KiB, text/plain)

Revision history for this message

Bernd Porr (berndporr) wrote on 2020-09-09:

#4

/etc/apt tar ball with source.list and sources.list.d Edit (2.3 KiB, application/x-tar)

Revision history for this message

Bernd Porr (berndporr) wrote on 2020-10-02:

#5

do-release-upgrade still doesn't work.

Workaround (the Debian way):

sed -i 's/bionic/focal/g' /etc/apt/sources.list
apt update
apt -y dist-upgrade
grub-install

... which works perfectly.

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