Ubuntu shows "Software Update Installed" every time I log in

[Nick Tait]

I recently upgraded my Ubuntu distro to version 23.10, and around the same time I also upgraded some firmware (fwupdmgr upgrade). Now every time I log in I see the same message at the top of the screen saying:

  Software Update Installed
  An important OS update has been installed

If I click on the date at the top of the screen, then click "Clear", the notification goes away, but if I log off and back on again it appears again.

I did some Googling and found a couple of reports of the same or similar issues. E.g. https://www.reddit.com/r/Ubuntu/comments/165n5ee/ubuntu_says_software_update_has_been_installed_on/?rdt=58698

The above link indicates others are experiencing the same issue on Ubuntu 23.10:
> Commercial-Extent-40 16 hr. ago
> I have the same problem on Ubuntu 23.10. None of the posted suggestions work for me.

Sorry I don't know which Ubuntu package is causing the notification. I also can't say whether the problem was caused by the distro upgrade or the firmware upgrade (or both)?

$ lsb_release -rd
No LSB modules are available.
Description: Ubuntu 23.10
Release: 23.10

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: ubuntu-desktop 1.524
ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
Uname: Linux 6.5.0-10-generic x86_64
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: pass
CloudArchitecture: x86_64
CloudID: none
CloudName: none
CloudPlatform: none
CloudSubPlatform: config
CurrentDesktop: ubuntu:GNOME
Date: Mon Nov 13 22:49:10 2023
InstallationDate: Installed on 2021-07-24 (842 days ago)
InstallationMedia: Ubuntu-Server 21.04 "Hirsute Hippo" - Release amd64 (20210421)
SourcePackage: ubuntu-meta
UpgradeStatus: Upgraded to mantic on 2023-11-05 (8 days ago)

[Nick Tait (nick.t)]

In my case gnome-software isn't installed:

$ dpkg -l gnome-software
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-============-============-=================================
un gnome-software <none> <none> (no description available)

Do you still think this is a duplicate of bug #2024392?