Hello,

The update notification says there's an update. Yet when clicking on it, discover starts and says there's none.
apt and pkcon says there's no updates.

help.
thanks.

Do

sudo pkcon refresh
sudo pkcon update

logoff/logon

Notification should be gone, now.

I've tried that sudo pkcon ... but it doesn't change a thing and it did say that there's no package to upgrade.
Same thing for sudo apt-get update ; sudo apt-get dist-upgrade

Stillget the notification that says that there's a package to upgrade but when click on it discover says that there's none.

Next, try:

$ aptitude search '?broken'

What happens after rebooting?

aptitude seach '?broken' return nothing
today some updates came in, so I did them hoping that doing those updates would "by the way" fix something.
But after rebooting the problem is still there.
I've have already muon, but it doesn't see something broken.
I've install synaptic to thest its "repair broken packages" but it also doesn't see a problem.

If I remember correctly, I think, but not sure, it all started when I added a widget (sysmon) and then removed it. Maybe that's a clue.

does anybody has any idea?
where does the update notifier gets its info?

First off: I've no Linux-OS available right now.

Things to test:

1)
There may be a lock-file left that has to be removed, manually.

2)
The update-notifier should appear in the output of
$ ps -Ae

I can't remember its exact name, but You'll know it when You see it.
Do:
$ kill <whatever its name is>

Then restart it with its name from
the command-line and see whether warnings/errors come up.

I have the same issue. Synaptic shows no broken packages. Software Center shows no updates. Refreshing the Discover icon on Panel via right mouse click does nada. Process name when Discover is active is
plasma-discover. That process does not show via ps -Ae after Discover is closed.

After searching I've found that I can start the widget from terminal typing : " plasmawindowed org.kde.discovernotifier " in the terminal.
I did that, the notifier opens in a window saying that there's an update. clicked on the update button. Dicover starts and says that there's nothing. Then exited from discover and quit windows of the notifier.
Here's the output on the terminal during all that process, does anyone have a clue?:

org.kde.plasmaquick: Applet preload policy set to 1
org.kde.plasma: requesting config for "Actualizaciones" without a containment!
qml: 0
couldn't understand value for timer: ""
using... PackageKit::Transaction(0x5607a4019160) "/6228_dadadded"
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/ScrollablePage.qml:182: TypeError: Cannot assign to read-only property "parent"
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/ScrollablePage.qml:182: TypeError: Cannot assign to read-only property "parent"
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/ScrollablePage.qml:182: TypeError: Cannot assign to read-only property "parent"
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/ScrollablePage.qml:182: TypeError: Cannot assign to read-only property "parent"
adding empty sources model QStandardItemModel(0x56539199bf60)
no packages for "org.kde.plasma.systemloadviewer"
no packages for "cockpit.desktop"
no packages for "org.kde.plasma.showActivityManager"
no packages for "org.kde.plasma.grouping"
no packages for "org.kde.plasma.diskquota"
no packages for "org.kde.kscreen"
no packages for "org.kde.plasma.kimpanel"
no packages for "org.kde.plasma.timer"
no packages for "im.riot.webapp"
no packages for "org.kde.plasma.appmenu"
no packages for "org.kde.plasma.quicklaunch"
invalid kns backend! "/etc/xdg/servicemenu.knsrc" because: "Config group not found! Check your KNS3 installation."
invalid kns backend! "/etc/xdg/ksysguard.knsrc" because: "Config group not found! Check your KNS3 installation."
QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once QUrl("https://download.kde.org/ocs/providers.xml")
using... PackageKit::Transaction(0x7f49b801ce30) "/6232_cadeeded"
<Unknown File>:1: TypeError: Cannot read property 'Layout' of null

I have exactly the same problem since yesterday after aplying updates through konsole with "apt" on kubuntu... Cannot find a solution still...

https://bugs.kde.org/show_bug.cgi?id=385754
Looks to be fixed in Plasma 5.16
https://pointieststick.com/2019/03/16/k ... y-week-62/

claydoh wrote:https://bugs.kde.org/show_bug.cgi?id=385754
Looks to be fixed in Plasma 5.16
https://pointieststick.com/2019/03/16/k ... y-week-62/

Forgot to mention my plasma version its 5.15.3 on Kubuntu 18.10. I guess i will have to wait till 5.16 becomes available! Thanks for the info and the quick response! Have a good day sir!

It is happening to me in KDE neon 5.22 user edition. I have tried all the above steps but to no avail

Problem appeared for me yesterday after doing updates