Comment # 14 on bug 1057007 from Nirmoy Das

(In reply to Thorsten Kukuk from comment #13)
> Any update here? It's getting anoying that all new Tumbleweed installations
> show "localhost" at the login prompt as hostname ...

Please test with
https://build.opensuse.org/package/show/network:wicked:testing/wicked and let
us know if it fixes the problem