Public bug reported:
Subject: do-release-upgrade from Ubuntu 24.04 Noble to 26.04 Resolute
fails during dependency calculation
The system is Ubuntu 24.04 Noble on x86_64, using Xubuntu/XFCE
components.
The command:
sudo do-release-upgrade
detects Ubuntu 26.04 LTS Resolute correctly, downloads and authenticates
the upgrade tool, rewrites the repositories to resolute, and then aborts
with:
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
The original system is restored afterwards.
Relevant log error:
E:Error, pkgProblemResolver::Resolve generated breaks,
this may be caused by held packages.
Before the upgrade attempt, the current Noble system is consistent:
sudo apt-get check
# no errors
sudo apt-get -s full-upgrade
# only alsa-ucm-conf deferred due to phasing
The upgrade fails even after disabling all third-party repositories and
Ubuntu Pro ESM services.
The resolver repeatedly reports conflicts involving:
- python3-gi and gir1.2-peas-1.0
- rhythmbox and libpeas-1.0-1
- libreoffice-common and libreoffice-core
- libreoffice-core and libxmlsec1-1
- gnome-settings-daemon and mutter-common
- mutter-common and libmutter-14-0
The Foreign package list is empty after source rewriting.
Please investigate the resolute dependency set or release-upgrader
resolver behavior.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.29
ProcVersionSignature: Ubuntu 6.8.0-146.146-generic 6.8.12
Uname: Linux 6.8.0-146-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports:
640:1000:127:107305796:2026-10-02 12:58:22.691650971 +0200:2026-10-02
12:58:08.858581457
+0200:/var/crash/_usr_lib_x86_64-linux-gnu_opera-stable_opera.1000.crash
640:1000:127:5020436:2026-10-01 09:24:54.878683829 +0200:2026-10-01
09:24:51.311684062
+0200:/var/crash/_usr_lib_x86_64-linux-gnu_gstreamer1.0_gstreamer-1.0_gst-plugin-scanner.1000.crash
CurrentDesktop: MATE
Date: Fri Oct 2 15:36:41 2026
InstallationDate: Installed on 2021-10-20 (1808 days ago)
InstallationMedia: Ubuntu-MATE 20.04.3 LTS "Focal Fossa" - Release amd64
(20210819.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-10-02 (0 days ago)
VarLogDistupgradeAptHistorylog:
Start-Date: 2026-10-02 13:31:50
Requested-By: ba (1000)
End-Date: 2026-10-02 13:31:50
VarLogDistupgradeApttermlog:
Log started: 2026-10-02 13:31:50
Log ended: 2026-10-02 13:31:50
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade noble
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https://bugs.launchpad.net/bugs/2169295
Title:
Release upgrade failed. I changed Mate desktop to xfce and the
release upgrade doesn't work.
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