Public bug reported:
Trying to upgrade from 18.04 to 20.04. Machine was off for the last 2
years.
An unresolvable problem occurred while calculating the upgrade.
This was likely caused by:
* Unofficial software packages not provided by Ubuntu
Please use the tool 'ppa-purge' from the ppa-purge
package to remove software from a Launchpad PPA and
try the upgrade again.
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
you want to investigate this yourself the log files in
'/var/log/dist-upgrade' will contain details about the upgrade.
Specifically, look at 'main.log' and 'apt.log'.
In main.log and apt.log I only get:
sudo ack "ERROR Dist-upgrade" /var/log/dist-upgrade
/var/log/dist-upgrade/20210409-2136/main.log
123:2021-04-09 21:32:27,108 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolver::Resolve generated breaks, this may be caused by held
packages.'
/var/log/dist-upgrade/main.log
116:2021-04-09 21:57:40,820 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolver::Resolve generated breaks, this may be caused by held
packages.'
/var/log/dist-upgrade/20210409-2156/main.log
115:2021-04-09 21:45:52,083 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolver::Resolve generated breaks, this may be caused by held
packages.'
/var/log/dist-upgrade/20210409-2144/main.log
115:2021-04-09 21:38:20,080 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolver::Resolve generated breaks, this may be caused by held
packages.'
I have no held packages, and there are no packages to upgrade.
sudo apt upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
apt-mark showhold gives nothing.
I'm at a loss...
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
ProcVersionSignature: Ubuntu 4.15.0-140.144-generic 4.15.18
Uname: Linux 4.15.0-140-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 9 21:58:11 2021
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-04-09 (0 days ago)
** 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/1923256
Title:
Unable to Upgrade from 18.04 to 20.04
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