Public bug reported:
When I tried to upgrade from 22.04.5 to 26.04 I got a failure message
saying An unresolvable problem occurred while calculating the upgrade.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-release-upgrader-core 1:22.04.21
ProcVersionSignature: Ubuntu 5.15.0-164.174-lowlatency 5.15.193
Uname: Linux 5.15.0-164-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu82.10
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CurrentDesktop: LXQt
Date: Sun Nov 1 09:58:53 2026
InstallationDate: Installed on 2022-04-28 (1647 days ago)
InstallationMedia: Lubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to jammy on 2026-11-01 (0 days ago)
VarLogDistupgradeAptHistorylog:
Start-Date: 2026-11-01 09:44:29
Requested-By: edward (1000)
End-Date: 2026-11-01 09:44:29
VarLogDistupgradeApttermlog:
Log started: 2026-11-01 09:44:29
Log ended: 2026-11-01 09:44:29
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade jammy
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https://bugs.launchpad.net/bugs/2172723
Title:
Attempted to upgrade OS. An unreasolvable problem occured.
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