root@blackrouter:/etc/hostapd# uname -a
Linux blackrouter 3.0.0-16-server #28-Ubuntu SMP Fri Jan 27 18:03:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
root@blackrouter:/etc/hostapd# aptitude show hostapd libnl1
Package: hostapd
New: yes
State: installed
Automatically installed: no
Version: 1:0.7.3-2build1
Priority: optional
Section: universe/net
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Uncompressed Size: 975 k
Depends: libc6 (>= 2.4), libnl1 (>= 1.1), libssl1.0.0 (>= 1.0.0), lsb-base (>= 3.2-13)
Conflicts: hostapd
Description: user space IEEE 802.11 AP and IEEE 802.1X/WPA/WPA2/EAP Authenticator
 Originally, hostapd was an optional user space component for Host AP driver. It adds more features to the basic IEEE 802.11
 management included in the kernel driver: using external RADIUS authentication server for MAC address based access control, IEEE
 802.1X Authenticator and dynamic WEP keying, RADIUS accounting, WPA/WPA2 (IEEE 802.11i/RSN) Authenticator and dynamic TKIP/CCMP
 keying.

 The current version includes support for other drivers, an integrated EAP authenticator (i.e., allow full authentication without
 requiring an external RADIUS authentication server), and RADIUS authentication server for EAP authentication.

 hostapd works with the following drivers:

 * mac80211 based drivers with support for master mode
 * Host AP driver for Prism2/2.5/3,
 * madwifi driver for cards based on Atheros chip set (ar521x),
 * Any wired Ethernet driver for wired IEEE 802.1X authentication.
Homepage: http://w1.fi/

Package: libnl1
New: yes
State: installed
Automatically installed: yes
Version: 1.1-6ubuntu1
Priority: optional
Section: universe/libs
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Uncompressed Size: 426 k
Depends: libc6 (>= 2.8)
Conflicts: libnl1
Description: library for dealing with netlink sockets
 This is a library for applications dealing with netlink sockets. The library provides an interface for raw netlink messaging and
 various netlink family specific interfaces.
Homepage: http://www.infradead.org/~tgr/libnl/

root@blackrouter:/etc/hostapd# lspci | grep AR9285
04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)

root@blackrouter:/etc/hostapd# modprobe ath9k
root@blackrouter:/etc/hostapd# dmesg |grep ath9k
[223431.160924] ath9k: Driver unloaded
[223569.662559] ath9k 0000:04:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[223569.662585] ath9k 0000:04:00.0: setting latency timer to 64
[223569.714423] ieee80211 phy4: Selected rate control algorithm 'ath9k_rate_control'
[223569.716754] Registered led device: ath9k-phy4
root@blackrouter:/etc/hostapd# iw phy phy4 interface add wlan1 type ap
See http://wireless.kernel.org/RTFM-AP.
root@blackrouter:/etc/hostapd# iwconfig wlan1
wlan1     IEEE 802.11bgn  ESSID:off/any
          Mode:Managed  Access Point: Not-Associated   Tx-Power=0 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:on

root@blackrouter:/etc/hostapd# cat atheros_ar9285_wlan1.conf
# ar9285
interface=wlan1
driver=nl80211
country_code=EU
logger_syslog=-1
logger_syslog_level=0
logger_stdout=-1
logger_stdout_level=0
dump_file=/tmp/ar9285.dump
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=civ
eap_message=loud and clear
hw_mode=g
ieee80211n=1
ht_capab=[RX-STBC1][SHORT-GI-40][DSSS_CCK-40][HT40-][HT40+][HT20]
channel=9
beacon_int=100
dtim_period=2
max_num_sta=255
rts_threshold=2347
fragm_threshold=2346
preamble=1
auth_algs=3
ignore_broadcast_ssid=0
wmm_enabled=1
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0
own_ip_addr=192.168.1.1
wpa=3
wpa_key_mgmt=WPA-PSK
wpa_pairwise=CCMP
auth_algs=2
eapol_version=2
eapol_key_index_workaround=0
use_pae_group_addr=1
eap_server=0
wpa_group_rekey=600
wpa_gmk_rekey=86400
wpa_passphrase=testtest

root@blackrouter:/etc/hostapd# hostapd -d atheros_ar9285_wlan1.conf
Configuration file: atheros_ar9285_wlan1.conf
ctrl_interface_group=0
eapol_version=2
nl80211: Add own interface ifindex 288
nl80211: New interface mon.wlan1 created: ifindex=290
nl80211: Add own interface ifindex 290
BSS count 1, BSSID mask 00:00:00:00:00:00 (0 bits)
nl80211: Added 802.11b mode based on 802.11g information
RATE[0] rate=10 flags=0x1
RATE[1] rate=20 flags=0x1
RATE[2] rate=55 flags=0x1
RATE[3] rate=110 flags=0x1
RATE[4] rate=60 flags=0x0
RATE[5] rate=90 flags=0x0
RATE[6] rate=120 flags=0x0
RATE[7] rate=180 flags=0x0
RATE[8] rate=240 flags=0x0
RATE[9] rate=360 flags=0x0
RATE[10] rate=480 flags=0x0
RATE[11] rate=540 flags=0x0
Scan for neighboring BSSes prior to enabling 40 MHz channel
Scan requested (ret=0) - scan timeout 10 seconds
Interface initialization will be completed in a callback
nl80211: Event message available
nl80211: Scan trigger
RTM_NEWLINK: operstate=0 ifi_flags=0x1002 ()
RTM_NEWLINK, IFLA_IFNAME: Interface 'mon.wlan1' added
Unknown event 5
RTM_NEWLINK: operstate=0 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'mon.wlan1' added
Unknown event 5
RTM_NEWLINK: operstate=0 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan1' added
Unknown event 5
nl80211: Event message available
nl80211: New scan results available
Received scan results (0 BSSes)
40 MHz affected channel range: [2437,2487] MHz
Completing interface initialization
Mode: IEEE 802.11g  Channel: 9  Frequency: 2452 MHz
nl80211: Failed to set channel (freq=2452): -22 (Invalid argument)
Could not set channel for kernel driver
RTM_NEWLINK: operstate=0 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan1' added
Unknown event 5