Discover won't install "calibe E-book Viewer" or the full version "calibre" and gives the message at the bottom of its window:

"Auflösung der Abhängigkeit fehlgeschlagen" (original german message)
"Dependency resolution failed" (don't know if that's the correct english translation)

This happens on fresh install of KDE Neon 19.1 (neon user edition from 2020-06-18)

Is this a bug or is there any package missing for installing calibre?

Are you trying to install it from the Repos?
The method recommended by Calibre is here:
https://calibre-ebook.com/download_linux

Thank you for pointing me to the calibre install instructions on the calibre web page. I already did that and it worked.

As said my system is a fresh KDE neon install. No Flatpak, Snap or AUR installed. Just opened Discover, searched for calibre, clicked on install and it failed.

Calibre does have a lot of dependencies. Have you had issues installing other things?

Caibre is one of the very small list of Ubuntu packages that won't install on Neon due to Neon having a newer Qt version.

Calibre is quite outdated in Ubuntu anyway, so using their recommended installation instructions is better than native packages in this case.

@waynes
No other problems with Discover yet, all other Discover installs I did worked fine.

@claydoh
> you wrote: Calibre is quite outdated in Ubuntu anyway, so using their recommended installation instructions is better than native packages in this case.
If Calibre installation using Discover doesn't work and isn't recommend, it might be a good idea to remove the Calibre entry from Discover to avoid confusion.

mireiner wrote:@waynes
No other problems with Discover yet, all other Discover installs I did worked fine.

@claydoh
> you wrote: Calibre is quite outdated in Ubuntu anyway, so using their recommended installation instructions is better than native packages in this case.
If Calibre installation using Discover doesn't work and isn't recommend, it might be a good idea to remove the Calibre entry from Discover to avoid confusion.

That would probably be a bit difficult to do, I think, being that Neon is basically a repo added to Ubuntu. The recommendation is from Calibre, who prefer people use their more up to date releases over distro packaging no matter which distro it is.

imo I don't think the dev team cares about 5 or 6 arguably less popular and highly outdated packages, ones that even Ubuntu don't actually package themselves. Calibre is actually a Debian package imported into the archives, and not re-built or updated specifically for Ubuntu.