Public bug reported:
I tried upgrading from Software Updater and obtained the mentioned error.
Then I tried to upgrade from terminal with commands
sudo apt update && sudo apt full-upgrade
which returned 'All packages are up to date' and then
sudo do-release-upgrade
which returned the above error.
During the process the release upgrader reported the existence of one snap
warning. When I issued the command
snap warnings
I obtained
last-occurrence: 22 days ago, at 14:47 CEST
warning: |
snap "desktop-security-center" has bad plugs or slots: ubuntu-pro-control
(unknown interface "ubuntu-pro-control")
The Ubuntu release is 25.10
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: ubuntu-release-upgrader-core 1:25.10.10
Uname: Linux 6.19.8-surface-3 x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CrashReports:
644:0:115:0:2026-05-16 18:27:29.102999975 +0200:2026-05-16 18:27:29.079999975
+0200:/var/crash/kdump_lock
640:1000:115:311222:2026-05-15 09:11:19.635236501 +0200:2026-05-15
09:11:29.344287849 +0200:/var/crash/_usr_lib_cargo_bin_coreutils_cat.1000.crash
664:1000:115:0:2026-05-15 09:11:29.323136039 +0200:2026-05-15
09:11:29.323136039 +0200:/var/crash/_usr_lib_cargo_bin_coreutils_cat.1000.upload
640:60578:115:1523774:2026-05-15 09:05:54.708520150 +0200:2026-05-15
09:05:53.531520168 +0200:/var/crash/_usr_bin_wireplumber.60578.crash
600:108:115:37:2026-05-15 09:11:31.179962304 +0200:2026-05-15
09:11:31.179115690
+0200:/var/crash/_usr_lib_cargo_bin_coreutils_cat.1000.uploaded
CurrentDesktop: ubuntu:GNOME
Date: Sat May 16 16:30:17 2026
InstallationDate: Installed on 2023-05-29 (1083 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Release amd64 (20230418)
PackageArchitecture: all
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to questing on 2026-05-16 (0 days ago)
VarLogDistupgradeTermlog:
mtime.conffile..etc.update-manager.release-upgrades: 2025-05-08T12:51:06.438266
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade questing third-party-packages
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https://bugs.launchpad.net/bugs/2152792
Title:
Upgrade to latest version 26-04 from 25-10 failed with error "Could
not calculate the upgrade"
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