Hey #Ubuntu friends: I keep fatfingering the numlock key and switching off my numeric keypad. I used Tweaks to set "Numeric keypad always enters digits" to true, but hitting numlock still switches off the numeric keypad. I also tried using xmodmap to set numlock to blank, but it rejected every identifier I tried for the key ("77," "0xff7f," "Num_Lock") with "bad keycode value".
SOLVED: Used Input Remapper to map Num Lock to a random Alt key.