[Bug 1998888] Re: An unresolvable problem occurred while calculating the upgrade

[Yovan]

recreated the default trusted.gpg in /etc/apt/trusted.gpg.d/ mostly solved the issue of not being able to upgrade from 22.03 to 22.10. Previously i misinterpreted the message of moving every gpg files into /usr/share/keyrings/ .
Except for the file trusted.gpg, all gpg files are happily situated in /usr/share/keyrings , this kept the Ubuntu system happy for the upgrade to the latest Ubuntu 22.10

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https://bugs.launchpad.net/bugs/1998888

Title:
  An unresolvable problem occurred while calculating the upgrade

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

Bug description:
  During the upgrade, there are two prompts

  1)

  "No valid mirror found

  While scanning your repository information, no mirror entry for the 
  upgrade was found. This can happen if you run an internal mirror or 
  if the mirror information is out-of-date. 

  Do you want to rewrite your 'sources.list' file anyway? If you choose 
  'Yes' here, it will update all 'jammy' to 'kinetic' entries. 
  If you select 'No', the upgrade will cancel. "

  2)

  "Generate default sources?

  After scanning your 'sources.list' no valid entry for 'jammy' was 
  found. 

  Should default entries for 'kinetic' be added? If you select 'No', 
  the upgrade will cancel. "

  In Conclusion, the upgrade failed when running "sudo do-release-
  upgrade -m desktop"

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.14
  ProcVersionSignature: Ubuntu 5.15.0-56.62-generic 5.15.64
  Uname: Linux 5.15.0-56-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Tue Dec  6 12:42:11 2022
  InstallationDate: Installed on 2021-01-15 (689 days ago)
  InstallationMedia: Kubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to jammy on 2022-12-06 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2022-10-29T11:56:30.705046

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