[Bug 2152795] Re: distupgrade kubuntu 25.10 to 26.04 fails; many broken kde package dependencies including plasma-desktop

[WarrenHead]

I ran the suggestion, but unfortunately it did not solve the package
dependency between kubuntu-desktop and plasma-deskton.

On a whim, I tried this:
sudo aptitute distupgrade
   This removed a very large amount of packages, such as kubuntu-desktop.
Interesting, so I continued as before. Without rebooting and still in the running kubuntu-desktop, I executed:
sudo do-release-upgrade

After the reboot, I had a running Ubuntu 26.04, but ofcourse without desktop (cli only).
So I executed:
sudo apt update; sudo apt upgrade; sudo apt install kubuntu-desktop
After the succesful installation, and a reboot, the release upgrade is now complete.

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https://bugs.launchpad.net/bugs/2152795

Title:
  distupgrade kubuntu 25.10 to 26.04 fails; many broken kde package
  dependencies including plasma-desktop

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

Bug description:
  When performing a dist-upgrade from 25.10 to 26.04, the upgrader detects 39 broken kde packages.
  Since I created a snapshot (it is a vm on proxmox) beforehand, I can easily rollback.
  I could possibly start a new VM with clean install, but I would prefer to distupgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: ubuntu-release-upgrader-core 1:25.10.10
  ProcVersionSignature: Ubuntu 6.17.0-29.29-generic 6.17.13
  Uname: Linux 6.17.0-29-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Sat May 16 15:23:48 2026
  InstallationDate: Installed on 2023-12-16 (882 days ago)
  InstallationMedia: Kubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to questing on 2026-05-16 (0 days ago)
  VarLogDistupgradeAptHistorylog:
   Start-Date: 2026-05-16  15:22:36
   Requested-By: wvanmourik (1000)
   End-Date: 2026-05-16  15:22:37
  VarLogDistupgradeApttermlog:
   Log started: 2026-05-16  15:22:36
   Log ended: 2026-05-16  15:22:37

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