How to unlock the keyboard in Linux?

Linux kernels aren't "locked." If you want to make changes to it, you just have to recompile it from source. It has a fairly easy to use configuration program to aid you.

Try turning it on via the BIOS. if a password is there find a battery in the laptop and remove it.

If you go to the website where you got the laptop it should have info. the instruction guide might to if you have it

Since you posted this, you obviously don't have this problem.

use ur software on-screen keyboard Or...do a hard reset: turn off computer, remove ac adapter and battery, hold down power button for 20 seconds, put battery and ac adapter back on, then turn on...