[Bug 1970449] Re: GPG keys are not shown in Software and Updates

[Dan Streetman]

I believe the problem is that 'apt-key' uses only the
/etc/apt/trusted.gpg file, while software-properties now (correctly)
creates individual /etc/apt/trusted.gpg.d/*.gpg files for each key
added.

The software-properties AptAuth.py module should probably be changed to
stop using apt-key, and/or apt-key should be fixed to correctly use all
the 'trusted.gpg' files (main file and subdir/'drop-in' files).

This evaluation is just from a quick scan of apt-key source, so someone
might want to verify that apt-key is actually the problem.

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https://bugs.launchpad.net/bugs/1970449

Title:
  GPG keys are not shown in Software and Updates

Status in software-properties package in Ubuntu:
  Confirmed

Bug description:
  software-properties-gtk does not show the registered apt gpg keys in
  the "Authentication" tab on my Ubuntu 21.10 and 22.04 systems.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.10
  ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
  Uname: Linux 5.15.0-27-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Apr 26 20:48:04 2022
  InstallationDate: Installed on 2022-04-25 (0 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: No upgrade log present (probably fresh install)

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