Why did rm -rf /* corrupt BIOS settings?

Question

linux

I have a Lenovo X120e laptop with 64-bit Ubuntu 13.10. At some point, I got bored with it, and I switched to tty1 and entered the ill-fated command to see what would happen. After it completed the work, I rebooted the computer using the button and saw a black screen. There was no UEFI splash screen or any messages, just a black screen, a glowing power button and fan noise. The laptop came to life after removing the CMOS battery for a few minutes.
How could a command that deletes files harm lower-level software? There is no desire to repeat the experiment, because To remove the battery, you need to completely disassemble the laptop.

Answer 1

The UEFI partition was mounted, you deleted everything from it.