Usually not. On my laptop I have some Intel stuff which was supported out of the box. On my desktop I used a wireless USB adapter/stick, and Ubuntu told me that there were proprietary drivers to install. Does it not work for you?
(esconder) Se, de repente, o site aparecer numa língua diferente, basta clicar na bandeira da sua língua e tudo voltará ao normal. (pauloaguia) (mostrar todas as dicas)