Just after upgrading to Plasma 5.22.1 in KDE Neon User Edition, I started receiving notifications about available "phantom" updates on my system tray on every boot and no updates are available, I check this running the pkon commands and also checking up Discover that shows no updates. This is what I've tried to solve the issue, with no results:

* sudo pkcon refresh && sudo pkcon update
* sudo flatpak update
* sudo apt autoremove --purge

Finally, I went to the system tray configuration and manually disable the update icon. I wish and hope Aleix Pol or other contributor solve this bug.

I have encountered this exact same problem since upgrading to Plasma 5.22.1. I've tried the same steps you tried without any success in resolving this issue.

Maybe it is specific to some systems, or distros? I am not seeing this here on my two machines.
My first thought was that it might be theme updates from the KDE Store, but these would show in Discover like any other update.

I can confirm the problem on Debian/unstable with frameworks 5.83 and plasma 5.22.1, and I got two reports from users of my packages that this happens.

I have this happening on two machines, both running up-to-date KDE Neon (Plasma 5.22.1, Frameworks 5.83.0, Qt 5.15.3, Kernel 5.8.0-55-generic).

This appears to be a result of some sort of problem between Discover and Flatpak. If I remove the plasma-discover-backend-flatpak package and reboot, the Discover Notifier no longer alerts for updates in my system tray. Once I reinstall the plasma-discover-backend-flatpak package and reboot, the Discover Notifier is back in the system tray alerting me about updates that do not exist.

It looks like a similar bug was fixed back in Plasma 5.16: https://bugs.kde.org/show_bug.cgi?id=385754

Looks like this particular issue is being tracked in Bug #438670.

Yes, am having the same result!

I can confirm the problem
Operating System: KDE neon 5.22
KDE Plasma Version: 5.22.1
KDE Frameworks Version: 5.83.0
Qt Version: 5.15.3
Graphics Platform: X11
I cant find file from bug report

This is annoying, the update reports in the panel that there is an update of the system. It is not an update at all, the same files are spinning in a circle, a welded circle. Finish update restart it reports again I have an update, again the same file chain version. I'm using a stable version and it's not clear what's going on. Every update of the plasma spoils something, the last update 5.21 broke the desktop and the panel, this update 5.22 does not work thermal sensor, 5.22.1 infinite update, never finished story

Code: Select all

pkcon update
Getting updates               [=========================]         
Finished                      [=========================]         
Testing changes               [=========================]         
Finished                      [                         ] (0%) 
The following packages have to be installed:
 amd64-microcode-3.20191218.1ubuntu1.amd64      Processor microcode firmware for AMD CPUs
 intel-microcode-3.20210608.0ubuntu0.20.04.1.amd64      Processor microcode firmware for Intel CPUs
 iucode-tool-2.3.1-1.amd64      Intel processor microcode tool
 linux-generic-hwe-20.04-5.8.0.55.62~20.04.39.amd64     Complete Generic Linux kernel and headers
 linux-headers-5.8.0-55-generic-5.8.0-55.62~20.04.1.amd64       Linux kernel headers for version 5.8.0 on 64 bit x86 SMP
 linux-headers-generic-hwe-20.04-5.8.0.55.62~20.04.39.amd64     Generic Linux kernel headers
 linux-hwe-5.8-headers-5.8.0-55-5.8.0-55.62~20.04.1.all Header files related to Linux kernel version 5.8.0
 linux-image-5.8.0-55-generic-5.8.0-55.62~20.04.1.amd64 Signed kernel image generic
 linux-image-generic-hwe-20.04-5.8.0.55.62~20.04.39.amd64       Generic Linux kernel image
 linux-modules-5.8.0-55-generic-5.8.0-55.62~20.04.1.amd64       Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
 linux-modules-extra-5.8.0-55-generic-5.8.0-55.62~20.04.1.amd64 Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
The following packages have to be updated:
 distro-release-notifier-0.0+p20.04+trelease+git20210617.0325-0.amd64   Notification of new distro releases
 gir1.2-secret-1-0.20.4-0ubuntu1.amd64  Secret store (GObject-Introspection)
 libhogweed5-3.5.1+really3.5.1-2ubuntu0.2.amd64 low level cryptographic library (public-key cryptos)
 libnettle7-3.5.1+really3.5.1-2ubuntu0.2.amd64  low level cryptographic library (symmetric and one-way cryptos)
 libqt5waylandclient5-5.15.2+p20.04+tunstable+git20210617.0312-0.amd64  QtWayland client library
 libqt5waylandcompositor5-5.15.2+p20.04+tunstable+git20210617.0312-0.amd64     QtWayland compositor library
 libsecret-1-0-0.20.4-0ubuntu1.amd64    Secret store
 libsecret-common-0.20.4-0ubuntu1.all   Secret store (common files)
 libxml2-2.9.10+dfsg-5ubuntu0.20.04.1.amd64     GNOME XML library
 libxml2-utils-2.9.10+dfsg-5ubuntu0.20.04.1.amd64       XML utilities
 neon-desktop-4+p20.04+trelease+git20210617.1400.amd64  KDE neon Plasma Desktop system
 neon-essentials-desktop-0.4+p20.04+trelease+git20210617.1321.all       Profile of essential neon software for desktop profiles
 neon-settings-2-0.4+p20.04+trelease+git20210617.1321.all       Settings and artwork for KDE neon
 qtwayland5-5.15.2+p20.04+tunstable+git20210617.0312-0.amd64    QtWayland platform plugin
Proceed with changes? [N/y] y

Should be fixed in 5.22.2 due out next Tuesday.

Arch solved the problem. It did an update of the Discover program. Neon Have problem, Manjaro 2 identical version , one have problem, another no problem

Nate Graham this comment https://bugs.kde.org/show_bug.cgi?id=438670#c23 that the bug has been fixed with 5.22.2, which has not yet been published.

Thanks for the reply but I am still confused, I chose the stable version of Neon and I constantly have problems and many update programs as if I have the RR version eg Arch. Arch does not make plasma but Neon make plasma and Arch is much more stable as KDE plasma RR.

Arch probably patched the existing software to fix it, or have updated it with pre-release version of it from git., so Arch users get to test that the fixes work, so the rest of us don't have to, maybe?

The point of my writing is that I chose the Neon LTS version as a stable distribution and Arch as an unstable one. And now I have an inverse situation, if you can understand I have important data and I don't want to play with any distribution, now it's summer, heat, the thermal monitor in Neon doesn't work and it works in Manjar and Arch. False notification update. I have legal win 10 and in the end I will be forced to use windows for important data

Neon LTS is long dead.

But yet you want such a system to give you untested, pre-release software?
I would agree if it were a serious bug or vulnerability, and not an just an annoyance (a big one for many, to be sure!) for the perpetual complainers to latch on to .

However, it is not.
Bug was found and reported on Tuesday.
A fix was committed to git on Thursday.
Arch patched their package with this pre-release code on Friday.

The rest of the world will see the official fix with [url=https://community.kde.org/Schedules/Plasma_5#Future_releases]updates to be released by KDE on schedule this Tuesday[/].