Probaste a usar el hostapd?
Código BASH:
Ver originalsudo apt-get -y install hostapd
sudo nano /etc/default/hostapd
DAEMON_CONF="/etc/hostapd/hostapd.conf"
sudo nano /etc/hostapd/hostapd.conf
auth_algs=1
beacon_int=50
channel=6
country_code=ES
disassoc_low_ack=1
driver=nl80211
hw_mode=g
ht_capab=[HT40+][HT40-][SHORT-GI-40][RX-STBC1]
ieee80211d=1
ieee80211n=1
interface=wlan0
require_ht=0
rsn_pairwise=CCMP
ssid=SSID
wmm_enabled=1
wpa=2
wpa_key_mgmt=WPA-PSK
wpa_passphrase=passphrase