Updates on my #x200:
If I want to flash #libreboot I will need a special clip to connect the bios chip of the laptop to the GPIOs of a Raspberry Pi or BeagleBone Black.
Until now I have not found someone who sells this clips here in germany for an acceptable price. 😐
Looks like I have 3 options:
-running a libre os but life with the unfree uefi and use a wifi stick
-install a not 100% libre GNU/Linux
-find someone who can help me with flashing libreboot