Comment # 4 on bug 1204746 from Dr. Werner Fink

(In reply to Lukas Straub from comment #3)
> Hmm, That could be it. But I can't find anything on how to enable (or
> disable) installation of suggested packages in zypper. I installed with
> --recommends. zypper install-new-recommends won't install it either. I'm
> using the transactional-server role btw.

Petr had filed the bug boo#1197367, maybe he knows how to get suggested
packages installed by default.