I don't think it is? I normally turn all the power-saving stuff off, but it could have come back. In any case, the keyboards do have buffer to hold several key

I don't think it is? I normally turn all the power-saving stuff off, but it could have come back. In any case, the keyboards do have buffer to hold several keypresses, so I believe what happens is that the event loop kicks in, reads those keypresses, and dispatches them into the void; the booting stuff, on the other hand, only polls the keyboard when it's going to act on it.