At post #13742 i explain my workflow to use Sony A7S.
I use Ubuntu 16.04 LTS and here the last libgphoto version is 2.5.9.
The last libgphoto version available is 2.5.12 (in this version some bugs for Sony should be fixed...). With help of a friend now i can use 2.5.12 version (Zesty packkage) in ubuntu 16.04 but the problems still remain... So in the end i still use my workflow