我已经设置了 hostapd wifi 热点，但速度非常慢。这可能是什么原因造成的？Windows 客户端显示它是 802.11n，但链接速度为 5Mbps（实际速度低于 2Mbps）
root@home:~# uname -r
3.8.0-30-generic
root@home:~# lspci -v
02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Subsystem: AzureWave AW-NB037H 802.11bgn Wireless Half-size Mini PCIe Card [AR9002WB-1NGCD]
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at fe9f0000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [60] Express Legacy Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
Capabilities: [170] Power Budgeting <?>
Kernel driver in use: ath9k
root@home:~# lsmod | grep ath
ath9k 149924 0
ath9k_common 14055 1 ath9k
ath9k_hw 413629 2 ath9k_common,ath9k
ath 23827 3 ath9k_common,ath9k,ath9k_hw
mac80211 606457 1 ath9k
cfg80211 510937 3 ath,ath9k,mac80211
root@home:~# iwconfig
mon.wlan0 IEEE 802.11bgn Mode:Monitor Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
wlan0 IEEE 802.11bgn Mode:Master Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
root@home:~# cat /etc/hostapd/hostapd.conf | egrep -v "^(#.*)?$"
interface=wlan0
logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2
dump_file=/tmp/hostapd.dump
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=poma
hw_mode=g
channel=1
beacon_int=100
dtim_period=2
max_num_sta=255
rts_threshold=2347
fragm_threshold=2346
macaddr_acl=0
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
ieee80211n=1
eapol_key_index_workaround=0
eap_server=0
own_ip_addr=127.0.0.1
wpa=3
wpa_passphrase=***
wpa_key_mgmt=WPA-PSK WPA-EAP
wpa_pairwise=TKIP CCMP
rsn_pairwise=CCMP
root@home:~# cat /proc/sys/kernel/random/entropy_avail
2223