Public bug reported:
Get:1 Upgrade tool signature [833 B]
Get:2 Upgrade tool [950 kB]
Fetched 951 kB in 0s (0 B/s)
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py:237:
Warning: W:Download is performed unsandboxed as root as file
'resolute.tar.gz.gpg' couldn't be accessed by user '_apt'. - pkgAcquire::Run
(13: Permission denied)
result = fetcher.run()
authenticate 'resolute.tar.gz' against 'resolute.tar.gz.gpg'
extracting 'resolute.tar.gz'
Reading cache
Checking package manager
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Hit http://security.ubuntu.com/ubuntu noble-security InRelease
Hit http://us.archive.ubuntu.com/ubuntu noble InRelease
Hit http://us.archive.ubuntu.com/ubuntu noble-updates InRelease
Hit http://us.archive.ubuntu.com/ubuntu noble-backports InRelease
Hit https://esm.ubuntu.com/apps/ubuntu noble-apps-security InRelease
Hit https://ppa.launchpadcontent.net/ubuntuhandbook1/rawtherapee/ubuntu noble
InRelease
Hit https://esm.ubuntu.com/apps/ubuntu noble-apps-updates InRelease
Hit https://esm.ubuntu.com/infra/ubuntu noble-infra-updates InRelease
Hit https://esm.ubuntu.com/infra/ubuntu noble-infra-security InRelease
Fetched 0 B in 0s (0 B/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Checking for installed snaps
Calculating snap size requirements
Updating repository information
Hit http://security.ubuntu.com/ubuntu resolute-security InRelease
Hit http://us.archive.ubuntu.com/ubuntu resolute InRelease
Hit http://us.archive.ubuntu.com/ubuntu resolute-updates InRelease
Hit http://us.archive.ubuntu.com/ubuntu resolute-backports InRelease
Hit https://esm.ubuntu.com/apps/ubuntu resolute-apps-updates InRelease
Hit https://esm.ubuntu.com/apps/ubuntu resolute-apps-security InRelease
Hit https://esm.ubuntu.com/infra/ubuntu resolute-infra-updates InRelease
Hit https://esm.ubuntu.com/infra/ubuntu resolute-infra-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
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.28
ProcVersionSignature: Ubuntu 6.8.0-111.111-generic 6.8.12
Uname: Linux 6.8.0-111-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed May 6 10:05:47 2026
InstallationDate: Installed on 2020-10-13 (2031 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-05-06 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade noble wayland-session
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https://bugs.launchpad.net/bugs/2151336
Title:
An unresolvable problem occurred while calculating the upgrade
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