Nothing happens when attempting to "Update All" packages

[Hannu Koivisto]

Kubuntu 18.04 beta 20180404, installed to a virtual machine (Virtualbox 5.2.4, Kubuntu 17.10 host) for testing purposes.

I started the machine and since toolbar indicated there were updates, I launched discover. I clicked "Update All" to install all updates and the button text temporarily changed to "Cancel" but barely for long enough to notice. Then it changed back to "Update All". No updates were done.

I retried several times with the same result. The final retry made the button change permanently to "Cancel" with static "Tasks (0%)" display at the bottom left corner. Nothing happened according to UI and top. I had to kill the process.

I was able to update packages with apt-get without any problems.

I have successfully used discover twice before to update packages in this same installation.

I see lines such as

couldn't find resource for "libtsan0;8-20180414-1ubuntu1;amd64;ubuntu-bionic-main"

in my ~/.xsession-errors. The lines appear to match the packages for which updates were available. The set of lines also seems to be repeated for about as many times as I retried the update.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: plasma-discover 5.12.4-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Apr 16 12:13:55 2018
InstallationDate: Installed on 2018-04-05 (10 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404)
SourcePackage: plasma-discover
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Stefan (stefanonubuntu)]

I have the same behavior.
Sometimes when I click "Update All" nothing happens.
Sometimes it works.

I cannot confirm that the "Cancel" button changes back to "Update All".

[Scarlett Gately Moore (scarlettmoore)]

This bug is very old, if this is still an issue please update bug with info on a supported release.