How to make the Realtek SD Card Reader for HP Envy d001nl working in Ubuntu 15.10

Recently I bought an HP Envy d001nl and I’m very happy with it, but yesterday I realized that the Realtek SD Reader was not working properly under Ubuntu 15.10 Wily. Not good, since I badly need the SD Card reader for copying photos from my Pentax K-30… Let’see what can be done.
Source: Ziobudda.net