Case: Searching for app on Discover, it returns results while “checking for updates” is running, but once the check is complete it no longer returns search results.
- Kubuntu 18.04.2, 64-bit
- KDE Plasma: 5.12.6
- KDE Frameworks: 5.44.0
- Qt Version: 5.9.5
sudo appstreamcli refresh --force
It provides the foundation to build software-center applications, by providing metadata necessary for an application-centric view on package repositories. AppStream additionally provides specifications for things like an unified software metadata database, screenshot services and various other things needed to create user-friendly application-centers for (Linux) distributions.
Discover, updating its app cache on every launch, most likely causes a conflict with AppStream’s cache. Just a wild guess. Not debugging this.
If this doesn’t solve similar cases, a valid starting point for research might be: