Public bug reported:
I installed a clean copy of Ubuntu-Mate 24.04-6.6, performed the following
steps:
1. sudo apt update
2. sudo apt upgrade
3. sudo reboot
4. do-release-upgrade
The last few lines of output were
BEGIN>>
Updating repository information
Hit http://ports.ubuntu.com/ubuntu-ports resolute InRelease
Hit http://ports.ubuntu.com/ubuntu-ports resolute-updates InRelease
Hit http://ports.ubuntu.com/ubuntu-ports resolute-backports InRelease
Hit http://ports.ubuntu.com/ubuntu-ports resolute-security InRelease
Fetched 0 B in 0s (0 B/s)
Checking package manager
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate 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
Aborting
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
END>>
lsb_release -rd output:
No LSB modules are available.
Description: Ubuntu 24.04.5 LTS
Release: 24.04
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.29
Uname: Linux 6.6.121-36 armv7l
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: armhf
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports: 640:0:122:399869:2026-09-30 20:24:56.588884277 +0000:2026-09-30
20:24:51.050000003 +0000:/var/crash/_usr_lib_xorg_Xorg.0.crash
Date: Wed Sep 30 20:39:35 2026
PackageArchitecture: all
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-09-30 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug armhf dist-upgrade noble
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https://bugs.launchpad.net/bugs/2169072
Title:
do-release-upgrade fails with no error messages
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