The Atheros WiFi cards will not work in a T400 with the original proprietary
BIOS (because of a whitelist). However, they will work in a libreboot'ed
T400.
Known to work:
Atheros 150Mpbs Single Band:
https://h-node.org/wifi/view/en/103/Atheros-Communications-Inc--AR9285-Wireless-Network-Adapter--PCI-Express---rev-01-/1/1/undef/undef/undef/undef/wifi-works/AR5B95
Atheros 300Mbps Dual Band:
https://tehnoetic.com/tet-n300db
Atheros 450Mbps Dual Band:
https://tehnoetic.com/tet-n450db
You or other free software users might also be interested in:
Installation of libreboot on T400 and other models:
https://tehnoetic.com/tet-lis
T400 with libreboot and GNU/Linux-libre:
https://tehnoetic.com/tet-t400
