Troubleshooting - Some keyboard keys suddenly stopped working

caughtinalandslide

Honorable
Dec 27, 2012
1
0
10,510
NO Water damage, NO impact damage. I just woke up one day to find my spacebar not working. And then I noticed my entire bottom row of letter keys except 'B' and 'N' weren't working either. Also my 'T'. Rest of them seem to be fine.

This is a very peculiar error and I can't figure out what could be going wrong, I've never had any problem like this before. My primary OS is Ubuntu 14.04, but I also have ElementaryOS installed in dual boot, and the same problem persists in either OS.
How can I diagnose this issue? It can't be a software issue since it's happening across OSs. Could it be a simple dust issue?

Laptop - HP Envy 15