Hello!
I have an ubuntu 10.04 machine with dwa-552 + ath9k + hostapd. DWA-552
works in master mode as AP in G mode quite good, transfer rate is
~21mbit/sec (measured with iperf). But it won't go to 802.11n in master
mode. I can't understand why, iwconfig on dwa-552 says:
wlan0 IEEE 802.11bgn Mode:Master Frequency:2.412 GHz Tx-Power=27 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
I tried connecting with intel 4965agn from the same notebook but under
different oses - MS Vista and Backtrack 4 RC1, both connect in G mode
and give ~21mbit/sec. Under Vista I tried to turn off/on 802.11n mode in
device manager, nothing changed, only G mode.
version of hostapd 0.6.9, from ubuntu repo, I compiled and ran 0.7.3
from hostap.epitest.fi/hostapd, same picture - G mode works, N mode
shows up but does not work.
I've noticed one curious thing when playing with "ht_capab" in
hostapd.conf - when I have [HT40-] or [HT40+] in that line transfer rate
is very low, it's around 4-6mbit/sec. When the line is commented out or
has [HT20] speed rate is 21mbit/sec.
here's some info on the system:
uname -a:
Linux ubuntu 2.6.32-24-generic #43-Ubuntu SMP Thu Sep 16 14:17:33 UTC
2010 i686 GNU/Linux
lspci -v:
01:07.0 Network controller: Atheros Communications Inc. AR5008 Wireless
Network Adapter (rev 01)
Subsystem: D-Link System Inc Device 3a6d
Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 19
Memory at dfff0000 (32-bit, non-prefetchable) [size=64K]
Capabilities: [40] #80 [0000]
Kernel driver in use: ath9k
Kernel modules: ath9k
lines from dmesg:
[ 16.443999] phy0: Atheros AR5416 MAC/BB Rev:2 AR2133 RF Rev:81:
mem=0xdc9c0000, irq=19
[ 16.447697] cfg80211: Calling CRDA for country: CO
[ 16.482455] cfg80211: Regulatory domain changed to country: CO
[ 16.482460] (start_freq - end_freq @ bandwidth), (max_antenna_gain,
max_eirp)
[ 16.482464] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 16.482468] (5170000 KHz - 5250000 KHz @ 20000 KHz), (300 mBi, 1700 mBm)
[ 16.482471] (5250000 KHz - 5330000 KHz @ 20000 KHz), (300 mBi, 2300 mBm)
[ 16.482474] (5735000 KHz - 5835000 KHz @ 20000 KHz), (300 mBi, 3000 mBm)
/etc/hostapd/hostapd.conf
interface=wlan0
driver=nl80211
ssid=softap-3
hw_mode=g
ht_capab=[HT40-][SHORT-GI-40][DSSS_CCK-40]
channel=7
wpa=3
wpa_key_mgmt=WPA-PSK
wpa_passphrase=pass
wpa_pairwise=CCMP
ieee80211n=1
iw list:
Wiphy phy0
Band 1:
Capabilities: 0x104e
HT20/HT40
SM Power Save disabled
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT TX/RX MCS rate indexes supported: 0-15
Frequencies:
* 2412 MHz [1] (27.0 dBm)
* 2417 MHz [2] (27.0 dBm)
* 2422 MHz [3] (27.0 dBm)
* 2427 MHz [4] (27.0 dBm)
* 2432 MHz [5] (27.0 dBm)
* 2437 MHz [6] (27.0 dBm)
* 2442 MHz [7] (27.0 dBm)
* 2447 MHz [8] (27.0 dBm)
* 2452 MHz [9] (27.0 dBm)
* 2457 MHz [10] (27.0 dBm)
* 2462 MHz [11] (27.0 dBm)
* 2467 MHz [12] (disabled)
* 2472 MHz [13] (disabled)
* 2484 MHz [14] (disabled)
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
max # scan SSIDs: 4
Supported interface modes:
* IBSS
* managed
* AP
* AP/VLAN
* monitor
* mesh point
Supported commands:
* new_interface
* set_interface
* new_key
* new_beacon
* new_station
* new_mpath
* set_mesh_params
* set_bss
* authenticate
* associate
* deauthenticate
* disassociate
* join_ibss
* set_wiphy_netns
* connect
* disconnect
iw dev wlan0 station dump:
Station 1c:4b:d6:d6:60:7e (on wlan0)
inactive time: 8 ms
rx bytes: 160983
rx packets: 691
tx bytes: 59479
tx packets: 469
signal: -74 dBm
tx bitrate: 54.0 MBit/
Vladi
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
