https://bugzilla.kernel.org/show_bug.cgi?id=209373
--- Comment #2 from Jens R. (rapp.jens@gmail.com) --- I followed this description https://www.cyberciti.biz/faq/update-lenovo-bios-from-linux-usb-stick-pen/ for making a bootable stick and it didn't work on three different sticks..