Public bug reported:
When running sudo do-release-upgrade I get an error message and it
doesn't update my system.
My current version is 25.10 "Questing Quokka".
The package I am using is the one downloaded from sudo do-release-
upgrade.
I expected to have my OS upgraded to Resolute Racoon.
I instead got the following error message:
Calculating the changes
Could not determine the upgrade
An unresolvable problem occurred while calculating the upgrade.
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'.
Restoring original system state
The upgrade process then stopped.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: ubuntu-release-upgrader-core 1:25.10.10
ProcVersionSignature: Ubuntu 6.17.0-29.29-generic 6.17.13
Uname: Linux 6.17.0-29-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports: 640:1000:111:15762596:2026-05-14 13:25:30.682119779
+0100:2026-05-14 13:25:26.853016047 +0100:/var/crash/_opt_Mullvad
VPN_mullvad-gui.1000.crash
CurrentDesktop: KDE
Date: Mon May 18 17:49:17 2026
InstallationDate: Installed on 2025-10-25 (205 days ago)
InstallationMedia: Kubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to questing on 2026-05-18 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2026-05-14T13:32:32.728501
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade questing wayland-session
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2152927
Title:
Upgrading to 26.04 LTS "Resolute Racoon" resulted in an error even
though I removed my unsupported packages.
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https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2152927/+subscriptions
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