[Bug 2009266] [NEW] Software Updater window "The software on this computer is up to date" appearing unexpectedly

[Bill Miller]

Public bug reported:

On several Ubuntu 20.04 computers after recent updates to the updating
system (including updates to software-properties-gtk and its
dependencies, the referenced Software Updater window is displayed after
booting the PCs.

Unattended Updates are not enabled on the subject computers.

No manual run of update-manager was requested.

In this situation, receiving this pop up window is unexpected and
unwelcome.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: update-manager 1:20.04.10.11 [modified: usr/lib/python3/dist-packages/UpdateManager/Dialogs.py]
ProcVersionSignature: Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85
Uname: Linux 5.15.0-67-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Sat Mar  4 08:00:53 2023
InstallationDate: Installed on 2018-04-27 (1771 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to focal on 2021-10-03 (517 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/2009266

Title:
  Software Updater window "The software on this computer is up to date"
  appearing unexpectedly

Status in update-manager package in Ubuntu:
  New

Bug description:
  On several Ubuntu 20.04 computers after recent updates to the updating
  system (including updates to software-properties-gtk and its
  dependencies, the referenced Software Updater window is displayed
  after booting the PCs.

  Unattended Updates are not enabled on the subject computers.

  No manual run of update-manager was requested.

  In this situation, receiving this pop up window is unexpected and
  unwelcome.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: update-manager 1:20.04.10.11 [modified: usr/lib/python3/dist-packages/UpdateManager/Dialogs.py]
  ProcVersionSignature: Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85
  Uname: Linux 5.15.0-67-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: MATE
  Date: Sat Mar  4 08:00:53 2023
  InstallationDate: Installed on 2018-04-27 (1771 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to focal on 2021-10-03 (517 days ago)

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