Seems like Microsoft want x86 for itself completely and that results in companies trying to block Linux. However, that is not taken positive by the Linux community.
Linux to the people!
Lenovo, which is the company that got the IBM Laptops taken over, created shocking events when it announced that the Yoga 900 and 900S hybrids would work only with Windows. The company has now changed its stance, bringing Linux support to those PCs after huge protests from the Linux camp.
Linux runs, but do not try to run Windows on this BIOS Firmware
The company made a BIOS update so Linux can be loaded on Yoga 900, 900S and IdeaPad 710 models. The BIOS update adds an AHCI (Advance Host Controller Interface) SATA controller mode, so users can load Linux on the laptops.
This is a Linux-only BIOS, meaning it should be used only by those who want to load the OS. If you want to continue with Windows, do not load the firmware. “This BIOS is not intended to be used on machines running Windows operating systems,” Lenovo said.
Better than No support
So, while Lenovo gives Linux support to their PCs, you need to think twice before doing so as this BIOS version is not intended to work with Windows. However, if you have changed your mind to go for open source then this is a better solution. However, Lenovo should have released a BIOS that supports both at once.