The download links for Ubuntu 17.10 were temporarily removed from the distribution’s website while the project’s developers responded to a serious bug. The bug in question revolves around a kernel driver which affects Lenovo computers, corrupting their BIOS. The bug prevents users from adjusting and saving new BIOS settings.
“Basically on Lenovo Y50-70 after installing Ubuntu 17.10, many users reported a corrupted BIOS. It’s not possible to save new settings in BIOS anymore and after rebooting, the system starts with the old settings. Moreover (and most important) USB booting is not possible anymore since USB is not recognized. It’s very serious, since our machines do not have a CD-ROM. Lenovo forums at the moment are full of topics regarding this issue.”