[Bug 1923195] [NEW] Impossible to upgrade from 18.04 to 20.04.2

[Dominique Breton]

Public bug reported:

Same as Bug #1909401 but I don' t see it in the proposed list...
I try a "do-release-upgrade -p", but I get a "Impossible d'évaluer la mise à niveau 

Un problème insoluble est survenu lors du calcul de la mise à niveau"
Thank you

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
ProcVersionSignature: Ubuntu 4.15.0-140.144-generic 4.15.18
Uname: Linux 4.15.0-140-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Fri Apr  9 14:39:55 2021
InstallationDate: Installed on 2013-12-10 (2677 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-04-09 (0 days ago)

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


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

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https://bugs.launchpad.net/bugs/1923195

Title:
  Impossible to upgrade from 18.04  to 20.04.2

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

Bug description:
  Same as Bug #1909401 but I don' t see it in the proposed list...
  I try a "do-release-upgrade -p", but I get a "Impossible d'évaluer la mise à niveau 

  Un problème insoluble est survenu lors du calcul de la mise à niveau"
  Thank you

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 4.15.0-140.144-generic 4.15.18
  Uname: Linux 4.15.0-140-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Fri Apr  9 14:39:55 2021
  InstallationDate: Installed on 2013-12-10 (2677 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-04-09 (0 days ago)

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