I recently installed Linux-libre-3.9.2-gnu.
WiFi only works with the Trisquel default kernel (3.2.0) but not with the
latest version of Linux.
lspci lists the following network card.
02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless
Network Adapter (PCI-Express) (rev 01)
It is not the same chipset that the "Penguin Wireless N USB Adapter for GNU /
Linux (TPE-N150USB)" uses. I guess that the free firmware is included in the
Trisquel kernel but not yet in the upstream linux-libre kernel.