For some reason my keyboard doesn't work when I boot into Ubuntu sometimes. About half of the time. When this happens I have to restart 1-2 times before it starts working again. I'm using a Steelseries 6gv2 keyboard and it works with no problems in Windows. The cursor on login does not blink when this is happening. I have logged in with the on-screen keyboard and can confirm that it does not work when logged in either.
Will add command outputs on request. Thanks.