[Bug 2154077] [NEW] Cannot upgrade kubuntu to 26.04

[Clemente Aguiar]

Public bug reported:

Trying to upgrade from Kubuntu 24.10 to 26.04, and I get errors.
In /var/log/dist-upgrade/apt.log I get 
Broken kubuntu-desktop:amd64 Depends on systemd-coredump:amd64 < none | 259.5-0ubuntu1 @un umH >
  Considering systemd-coredump:amd64 2 as a solution to kubuntu-desktop:amd64 10000
  Re-Instated systemd-coredump:amd64
Investigating (0) qml6-module-org-kde-kirigami:amd64 < 6.17.0-0ubuntu2 -> 6.24.0-0ubuntu1 @ii umU Ib >
Broken qml6-module-org-kde-kirigami:amd64 Depends on libkirigami6:amd64 < 6.17.0-0ubuntu2 | 6.24.0-0ubuntu1 @ii umH > (= 6.24.0-0ubuntu1)
  Considering libkirigami6:amd64 56 as a solution to qml6-module-org-kde-kirigami:amd64 221
  MarkKeep qml6-module-org-kde-kirigami:amd64 < 6.17.0-0ubuntu2 -> 6.24.0-0ubuntu1 @ii umU Ib > FU=0
  Re-Instated libkirigami-data:amd64
  Re-Instated libkirigami6:amd64
  Re-Instated libkirigamidelegates6:amd64
  Re-Instated libkirigamicontrols6:amd64
  Re-Instated libkirigamipolyfill6:amd64
  Re-Instated qml6-module-org-kde-kirigami:amd64
Investigating (0) ...

etc.

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: ubuntu-release-upgrader-core 1:25.10.8
ProcVersionSignature: Ubuntu 6.17.0-29.29-generic 6.17.13
Uname: Linux 6.17.0-29-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports: 640:1000:125:11849441:2026-05-15 13:26:19.901445623 +0100:2026-05-15 13:26:14.892393791 +0100:/var/crash/_opt_TickTick_ticktick.1000.crash
CurrentDesktop: KDE
Date: Sat May 23 17:25:54 2026
InstallationDate: Installed on 2020-12-17 (1983 days ago)
InstallationMedia: Kubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to questing on 2026-05-23 (0 days ago)
VarLogDistupgradeAptHistorylog:
 Start-Date: 2026-05-23  17:25:06
 Requested-By: clemente (1000)
 End-Date: 2026-05-23  17:25:06
VarLogDistupgradeApttermlog:
 Log started: 2026-05-23  17:25:06
 Log ended: 2026-05-23  17:25:06

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade questing wayland-session

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https://bugs.launchpad.net/bugs/2154077

Title:
  Cannot upgrade kubuntu to 26.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Trying to upgrade from Kubuntu 24.10 to 26.04, and I get errors.
  In /var/log/dist-upgrade/apt.log I get 
  Broken kubuntu-desktop:amd64 Depends on systemd-coredump:amd64 < none | 259.5-0ubuntu1 @un umH >
    Considering systemd-coredump:amd64 2 as a solution to kubuntu-desktop:amd64 10000
    Re-Instated systemd-coredump:amd64
  Investigating (0) qml6-module-org-kde-kirigami:amd64 < 6.17.0-0ubuntu2 -> 6.24.0-0ubuntu1 @ii umU Ib >
  Broken qml6-module-org-kde-kirigami:amd64 Depends on libkirigami6:amd64 < 6.17.0-0ubuntu2 | 6.24.0-0ubuntu1 @ii umH > (= 6.24.0-0ubuntu1)
    Considering libkirigami6:amd64 56 as a solution to qml6-module-org-kde-kirigami:amd64 221
    MarkKeep qml6-module-org-kde-kirigami:amd64 < 6.17.0-0ubuntu2 -> 6.24.0-0ubuntu1 @ii umU Ib > FU=0
    Re-Instated libkirigami-data:amd64
    Re-Instated libkirigami6:amd64
    Re-Instated libkirigamidelegates6:amd64
    Re-Instated libkirigamicontrols6:amd64
    Re-Instated libkirigamipolyfill6:amd64
    Re-Instated qml6-module-org-kde-kirigami:amd64
  Investigating (0) ...

  etc.

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: ubuntu-release-upgrader-core 1:25.10.8
  ProcVersionSignature: Ubuntu 6.17.0-29.29-generic 6.17.13
  Uname: Linux 6.17.0-29-generic x86_64
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CrashReports: 640:1000:125:11849441:2026-05-15 13:26:19.901445623 +0100:2026-05-15 13:26:14.892393791 +0100:/var/crash/_opt_TickTick_ticktick.1000.crash
  CurrentDesktop: KDE
  Date: Sat May 23 17:25:54 2026
  InstallationDate: Installed on 2020-12-17 (1983 days ago)
  InstallationMedia: Kubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to questing on 2026-05-23 (0 days ago)
  VarLogDistupgradeAptHistorylog:
   Start-Date: 2026-05-23  17:25:06
   Requested-By: clemente (1000)
   End-Date: 2026-05-23  17:25:06
  VarLogDistupgradeApttermlog:
   Log started: 2026-05-23  17:25:06
   Log ended: 2026-05-23  17:25:06

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