Setting up WiFi in Ubuntu Server 12.04

Question

I have Netgear WNA1100 (Athreos 9271) based USB WiFi DOngle. I cannot start wlan0.I have installed the required firmware in /lib/firmware. OS is Ubuntu Server 12.04

Following are my configurations:

root@ubuntu:~# lsmod | grep ath9k ath9k_htc 90811 0 mac80211 436455 1 ath9k_htc ath9k_common 13781 1 ath9k_htc ath9k_hw 391554 2 ath9k_htc,ath9k_common ath 19387 3 ath9k_htc,ath9k_common,ath9k_hw cfg80211 178679 3 ath9k_htc,mac80211,ath

/network/interfaces

auto lo eth0 iface lo inet loopback

iface eth0 inet dhcp

auto wlan0 iface wlan0 inet dhcp

root@ubuntu:~# lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 0846:9030 NetGear, Inc. WNA1100 Wireless-N 150 [Atheros AR9271]

root@ubuntu:~# iwconfig lo no wireless extensions.

eth1 no wireless extensions.

eth0 no wireless extensions.

Answer 1

iwconfig and the wireless extension (WEXT) interface is mostly obsolete and I believe that it is in the process of being slowly removed from the kernel. Most modern wireless interface management tools on Linux use a more modern netlink-based interface, provided by the cfg80211 subsystem.

I would suggest that you try the iw instead of iwconfig.