It becomes really important. Before this issue is resolved, I can not switch to Sabayon as working horse.
When I tried Fedora, "mtron" gave me a help for installing additional files. Please see here
, the second contribution. The rest of the thread is not so interesting, as I do not want to make Fedora my bread and butter OS. I am sure, for Sabayon exist such drivers too, but where and how to install them?