[Bug 2010875] [NEW] cannot upgrade to 22.04

[carlo]

Public bug reported:

When I tried to upgrade it appeared a pop up saying:
"An unsolvable problem occurred while calculating progress. If this is another problem, report a bug by running the following command in a terminal: "ubuntu-bug ubuntu-release-upgrader-core". To investigate the problem, consult the log files in "/var/log/dist-upgrade" which may contain more details about the progress. In particular, see the files "main.log" and "apt.log"."

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.40
ProcVersionSignature: Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85
Uname: Linux 5.15.0-67-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: MATE
Date: Fri Mar 10 19:24:20 2023
InstallationDate: Installed on 2022-04-01 (343 days ago)
InstallationMedia: Ubuntu-MATE 20.04.4 LTS "Focal Fossa" - Release amd64 (20220223)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2023-03-10 (0 days ago)
VarLogDistupgradeTermlog:

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


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

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https://bugs.launchpad.net/bugs/2010875

Title:
  cannot upgrade to 22.04

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

Bug description:
  When I tried to upgrade it appeared a pop up saying:
  "An unsolvable problem occurred while calculating progress. If this is another problem, report a bug by running the following command in a terminal: "ubuntu-bug ubuntu-release-upgrader-core". To investigate the problem, consult the log files in "/var/log/dist-upgrade" which may contain more details about the progress. In particular, see the files "main.log" and "apt.log"."

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.40
  ProcVersionSignature: Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85
  Uname: Linux 5.15.0-67-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Fri Mar 10 19:24:20 2023
  InstallationDate: Installed on 2022-04-01 (343 days ago)
  InstallationMedia: Ubuntu-MATE 20.04.4 LTS "Focal Fossa" - Release amd64 (20220223)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2023-03-10 (0 days ago)
  VarLogDistupgradeTermlog:

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