It's FOSS - https://itsfoss.com/ubuntu-17-10-bios-bug/
Brief: Installing Ubuntu 17.10 bricks many Lenovo and some Toshiba and Acer laptops. Canonical has removed the Ubuntu 17.10 downloads from its website until this issue is fixed.
If you have a Lenovo laptop and you want to install the new Ubuntu 17.10 on it, you should forget about it, at least for now.
Ubuntu 17.10 users have been reporting a bug that corrupts the BIOS on a series of Lenovo laptops.
As OMG Ubuntu reports, the affected users are unable to save settings like boot order or the boot devices. Some users say there is a complete setting reset