In bug 320326 it was established that system-config-printer, though important, is not a mandatory runtime dependency. The (arguably bad) way in which s-c-p is designed, currently makes it require gtk+-3 among lots of other packages. Some users prefer to give up a little bit of convenience to avoid unnecessary dependencies. Currently, in that case, print-manager will display a cryptic, reddish error status during adding a printer:

"The name org.fedoraproject.Config.Printing was not provided by any .service files'"

If we really regard s-c-p as optional, this should be a warning instead, and only be displayed in the first dialog (searching for devices). After that, the user shouldn't be bothered with it.

Ideally, it would also be a more helpful message ;)

Reproducible: Always