LenovoとAcerと東芝とデルのBIOSが壊れるようだ
所詮は人柱バージョンだからな

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147

#### UPDATE (22/12/2017) ####

LENOVO machines affected so far (please add your affected model to this list):
Lenovo B40-70
Lenovo B50-70
Lenovo B50-80
Lenovo Flex-3
Lenovo Flex-10
Lenovo G40-30
Lenovo G50-30
Lenovo G50-70
Lenovo G50-80
Lenovo S20-30
Lenovo U31-70
Lenovo Y50-70
Lenovo Y70-70
Lenovo Yoga Thinkpad (20C0)
Lenovo Yoga 2 11" - 20332
Lenovo Z50-70
Lenovo Z51-70
Lenovo ideapad 100-15IBY