I did some cleanup and that fixed the problem. 1. uninstall all old snaps (which where shown in `df` command output as mounted volumes) 2. uninstalled snapd as well (apt purge snapd) 3. start with a fresh apt sources:
sudo mv /etc/apt/soruces.list /etc/apt/sources.list.problematic sudo touch /etc/apt/sources.list sudo software-properties-qt This will open software-properties-qt with no repositories selected. Enable some repositories in the "Ubuntu Software" order to create new sources.list file in /etc/apt/ Optionally, change the server to Main server or to any other server of your choice. After enabling some sources from Ubuntu software tab, you can enable the updates. To do so, switch to Updates tab and select one or more updates channel. I recommend selecting security and updates channel at least. 4. in the "other software" tab, also make sure there are no ppa's depending on old ubuntu versions. else, remove them, and re-add later. After the general cleanup as described above, the issue as described above with plasma-discover is resolved -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800078 Title: plasma-discover does not show updates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-discover/+bug/1800078/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
