Comment 12 for bug 267339

I'm having this problem too, with an Acer laptop (irrelevant) and this Atheros chip:

  06:05.0 Ethernet controller: Atheros Communications Inc. AR2413 802.11bg NIC (rev 01)

rmmodding and modprobing helps though, so all I'm waiting for is to have Trampas' solution in an official update :)