Hostapd and ath9k - AP not working

[Helena Zhang]

I tried setting channel and hw_mode:
interface=wlan0
driver=nl80211
ssid=test
channel=1
hw_mode=g
ieee80211n=1

But then I get:

Configuration file: hostapd.conf
Opening raw packet socket for ifindex 1208054188
BSS count 1, BSSID mask ff:ff:ff:ff:ff:ff (0 bits)
SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf
nl80211: Added 802.11b mode based on 802.11g information
RATE[0] rate=10 flags=0x2
RATE[1] rate=20 flags=0x2
RATE[2] rate=55 flags=0x2
RATE[3] rate=110 flags=0x2
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
Passive scanning not supported
Flushing old station entries
Deauthenticate all stations
Mode: IEEE 802.11g  Channel: 1  Frequency: 2412 MHz
Could not set channel for kernel driver
wlan0: Unable to setup interface.

The behavior is still the same as when I didn't have channel and hw_mode in
hostapd.conf:

# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      no wireless extensions.

wmaster0  no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:""
          Mode:Master  Frequency:2.412 GHz  Tx-Power=27 dBm
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
          Encryption key:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

ESSID is still blank and stations are still unable to see the ap.
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