Difference between the two Flatpak backends available in apt for Plasma Discover? Is there a problem from Installing both?

Solution 1:

TL;DR on modern systems 21.04, 21.10 and upcoming 22.04 LTS you have to use plasma-discover-backend-flatpak package, on older 18.04 LTS and 20.04 LTS systems it will be installed by transitional package named plasma-discover-flatpak-backend as dependency.

According to the search on packages.ubuntu.com both two packages exist with the following relations and properties:

• plasma-discover-flatpak-backend exists only in 18.04 LTS and 20.04 LTS.

  In 18.04 LTS is provides Flatpak functionality to Discover. In 20.04 LTS it depends on plasma-discover-backend-flatpak, the latter provides Flatpak functionality to Discover. For 20.04 LTS plasma-discover-flatpak-backend is marked as transitional package.

• plasma-discover-backend-flatpak exists in all modern Ubuntu releases like 20.04 LTS, 21.04, 21.10 and upcoming 22.04 LTS.

  This package provides Flatpak functionality to Discover.