I appreciate your help, thank you. My kernel is 4.10.0-42 generic, because I have come to the conclusion that 4.13 is not a good choice at the moment. All Lenovo users should wait a little bit. A lot of smart guys are working on this.
Personally speaking my BIOS is locked. Absolutely nothing works. I realized this a few months ago. Nothing worked so far and I think it is not only a matter of Ubuntu 17.10, there are some more cases. The good news is: My Bodhi system is working and I am updating more conservative than before.