[Bug 1875256] [NEW] Broken upgrade from Kubuntu 18.04 to Kubuntu 20.04

[tonalt drump]

Public bug reported:

As title says, after upgrading i've seen that Ksysguard was missing,
also lm-sensors that i use to monitor, i tried to install them but i've
got apt kind of stuck because lots of dependencies missing.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.18
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Mon Apr 27 01:20:23 2020
InstallationDate: Installed on 2017-01-16 (1196 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug dist-upgrade focal

** Attachment added: "apt.log"
   https://bugs.launchpad.net/bugs/1875256/+attachment/5361155/+files/apt.log

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https://bugs.launchpad.net/bugs/1875256

Title:
  Broken upgrade from Kubuntu 18.04 to Kubuntu 20.04

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

Bug description:
  As title says, after upgrading i've seen that Ksysguard was missing,
  also lm-sensors that i use to monitor, i tried to install them but
  i've got apt kind of stuck because lots of dependencies missing.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.18
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Mon Apr 27 01:20:23 2020
  InstallationDate: Installed on 2017-01-16 (1196 days ago)
  InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: No upgrade log present (probably fresh install)

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