I was using Ubuntu 16.04 and one day suddenly the keyboard stopped working. But the keyboard is working fine in BIOS. But it doesn't work once the system is booted into the OS. I tried installing all pending updates on Ubuntu and even upgraded the system to 18.04, but no way.

For testing purpose, I plugged in a wireless keyboard to my laptop and it is working fine in both BIOS and in OS. Now I'm not able to decide whether my OS has the problem or the keyboard (some hardware issues?). Is there any good keyboard drivers to try? I'm using HP-15 series laptop (I can update the model number later, if necessary).


PS: I'm fine with completely format the system and re-install Ubuntu, if it will solve the issue. Should I go with that option?

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