[Bug 1849885] Re: Upgrade Kubuntu 19.04 -> 19.10 fails

[Niko Theiner]

thats weird, after trying multiple times, the update manager failed
again with an error. But then I found out that it had already upgraded
my package sources to the Eoan Ermine versions, and I was able to simply
update via APT from the command line.

I am now on 19.10 / Plasma 5.16.5, so I guess I got it sorted. Still
strange though.

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https://bugs.launchpad.net/bugs/1849885

Title:
  Upgrade Kubuntu 19.04 -> 19.10 fails

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

Bug description:
  The updater fails, warns about third party PPAs. I have disabled all
  third party PPAs in package sources, but no luck, same error. It says
  I should use ppa-purge to remove third party launchpad ppa.

  main.log says "Dist-upgrade failed: 'Das Paket »update-manager-core«
  ist zum Löschen vorgesehen, wurde aber durch das System gesperrt.'"

  "The package update-manager-core is marked for deletion, but has been
  locked by the system".

  It seems to me that it tries to uninstall update-manager-core, but
  can't, because it is on the blacklist. Makes no sense to me, why
  should the update-manager uninstall itself during the update?

  1)
  Description:	Ubuntu 19.04
  Release:	19.04

  2)
  ubuntu-release-upgrader-core:
    Installiert:           1:19.04.16.7
   
  3) expected upgrader to upgrade my installation to 19.10 Eoan Ermine

  4) Updater fails, logfiles attached

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: ubuntu-release-upgrader-core 1:19.04.16.7
  ProcVersionSignature: Ubuntu 5.0.0-32.34-generic 5.0.21
  Uname: Linux 5.0.0-32-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.10-0ubuntu27.1
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Fri Oct 25 20:45:51 2019
  InstallationDate: Installed on 2018-04-30 (542 days ago)
  InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to disco on 2019-10-25 (0 days ago)
  VarLogDistupgradeTermlog:

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