Public bug reported:
Summary:
An unresolvable problem occurred while calculating the upgrade.
Steps to Reproduce:
1. Attempted to run the Ubuntu release upgrade process.
2. The system reached the "Fetching is complete" phase, after which a modal
dialog appeared.
Observed Behavior:
A modal window titled "Error" pops up with the following message:
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'.
The upgrade process cannot proceed beyond this calculation error.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.29
ProcVersionSignature: Ubuntu 6.8.0-147.147-generic 6.8.12
Uname: Linux 6.8.0-147-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports:
0:1000:110:0:2026-11-02 12:30:22.476221724 +0500:2026-11-02 12:30:22.476221724
+0500:/var/crash/_usr_lib_x86_64-linux-gnu_libexec_kdeconnectd.1000.crash
0:1000:110:0:2026-11-02 14:42:28.591638358 +0500:2026-11-02 14:42:28.591638358
+0500:/var/crash/_usr_bin_kwin_x11.1000.crash
CurrentDesktop: KDE
Date: Tue Nov 3 08:53:04 2026
InstallationDate: Installed on 2025-07-06 (485 days ago)
InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240425.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-11-03 (0 days ago)
VarLogDistupgradeAptHistorylog:
Start-Date: 2026-11-03 08:40:37
Requested-By: abubakar (1000)
End-Date: 2026-11-03 08:40:38
VarLogDistupgradeApttermlog:
Log started: 2026-11-03 08:40:37
Log ended: 2026-11-03 08:40:38
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade noble third-party-packages
** Description changed:
- Write description for this bug
- To effectively report this bug, you can use the structured text below for
your Bug Description section on Launchpad.
-
- Bug Description
-
Summary:
An unresolvable problem occurred while calculating the upgrade.
Steps to Reproduce:
1. Attempted to run the Ubuntu release upgrade process.
2. The system reached the "Fetching is complete" phase, after which a modal
dialog appeared.
Observed Behavior:
A modal window titled "Error" pops up with the following message:
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'.
The upgrade process cannot proceed beyond this calculation error.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.29
ProcVersionSignature: Ubuntu 6.8.0-147.147-generic 6.8.12
Uname: Linux 6.8.0-147-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports:
- 0:1000:110:0:2026-11-02 12:30:22.476221724 +0500:2026-11-02
12:30:22.476221724
+0500:/var/crash/_usr_lib_x86_64-linux-gnu_libexec_kdeconnectd.1000.crash
- 0:1000:110:0:2026-11-02 14:42:28.591638358 +0500:2026-11-02
14:42:28.591638358 +0500:/var/crash/_usr_bin_kwin_x11.1000.crash
+ 0:1000:110:0:2026-11-02 12:30:22.476221724 +0500:2026-11-02
12:30:22.476221724
+0500:/var/crash/_usr_lib_x86_64-linux-gnu_libexec_kdeconnectd.1000.crash
+ 0:1000:110:0:2026-11-02 14:42:28.591638358 +0500:2026-11-02
14:42:28.591638358 +0500:/var/crash/_usr_bin_kwin_x11.1000.crash
CurrentDesktop: KDE
Date: Tue Nov 3 08:53:04 2026
InstallationDate: Installed on 2025-07-06 (485 days ago)
InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Release amd64
(20240425.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-11-03 (0 days ago)
VarLogDistupgradeAptHistorylog:
- Start-Date: 2026-11-03 08:40:37
- Requested-By: abubakar (1000)
- End-Date: 2026-11-03 08:40:38
+ Start-Date: 2026-11-03 08:40:37
+ Requested-By: abubakar (1000)
+ End-Date: 2026-11-03 08:40:38
VarLogDistupgradeApttermlog:
- Log started: 2026-11-03 08:40:37
- Log ended: 2026-11-03 08:40:38
+ Log started: 2026-11-03 08:40:37
+ Log ended: 2026-11-03 08:40:38
VarLogDistupgradeTermlog:
--
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https://bugs.launchpad.net/bugs/2172798
Title:
An unresolvable problem occured while calculating the upgrade
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https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2172798/+subscriptions
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