[Bug 1918579] [NEW] LTS distribution upgrade to 20.04 fails with unresolvable problem

[Matthew Brown]

Public bug reported:

On trying to upgrade from Ubuntu 18.04.5 LTS I get the generic message
about an unspecified unresolvable problem.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
ProcVersionSignature: Ubuntu 4.15.0-136.140-generic 4.15.18
Uname: Linux 4.15.0-136-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity:Unity7:ubuntu
Date: Thu Mar 11 05:30:06 2021
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-09-18 (3461 days ago)
InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110720.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-03-11 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2021-03-11 05:29:40.357913
 Log time: 2021-03-11 05:30:03.142150

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


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

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https://bugs.launchpad.net/bugs/1918579

Title:
  LTS distribution upgrade to 20.04 fails with unresolvable problem

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

Bug description:
  On trying to upgrade from Ubuntu 18.04.5 LTS I get the generic message
  about an unspecified unresolvable problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 4.15.0-136.140-generic 4.15.18
  Uname: Linux 4.15.0-136-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Thu Mar 11 05:30:06 2021
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-09-18 (3461 days ago)
  InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110720.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-03-11 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2021-03-11 05:29:40.357913
   Log time: 2021-03-11 05:30:03.142150

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