I know that the behavior of your BIOS does not depend on what OS is installed but many people got the exact same problem after upgrading to Ubuntu 17.10.
https://askubuntu.com/questions/970451/unable-to-save-bios-options-after-ubuntu-17-10-upgrade
https://ubuntuforums.org/showthread.php?p=13714192&t=2378374#post13714192
https://forums.lenovo.com/t5/Linux-Discussion/Ubuntu-17-10-corrupts-Lenovo-BIOS-USB-not-recognized-not-saving/td-p/3887679
Read more: Why am I unable to save BIOS options after an Ubuntu 17.10 upgrade? I know it sounds weird but many people are having same problem
