Did you try setting the channel in the configuration file, i.e., channel=36? Can you share the hostapd log? Ilan. > -----Original Message----- > From: Hostap [mailto:hostap-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of v > lakshmi > Sent: Friday, August 25, 2017 16:27 > To: Wpa_supplicant <hostap@xxxxxxxxxxxxxxxxxxx> > Subject: hostapd config for 802.11ac failing > > Hi, > > I am trying to setup an Access point using hostapd in 802.11ac mode. > > The wireless interface pcie device supports 80MHz channel. > I verified that with "iw list". > > When I configure it in 5 Ghz mode, it works fine. > > When I configure vht_oper_chwidth=1 and then I get the error as > > ACS: Failed to get compute ideal channel. > ACS: Possibly channel configuration is invalid, pls report this along with your > config file. > > Here is the hostapd.conf that I am using > > interface=wlan1 > driver=nl80211 > hw_mode=a > ssid=test1234 > > ieee80211n=1 > ht_capab=[HT40+][LDPC][SHORT- GI-20][SHORT-GI-40][TX-STBC][ RX-STBC-1] > > ieee80211ac=1 > vht_oper_chwidth=1 > vht_oper_centr_freq_seg0_idx= 42 > vht_capab=[MAX-MPDU-11454][ RXLDPC][SHORT-GI-80][TX-STBC] > wmm_enabled=1 > wme_enabled=1 > wpa=2 > wpa_key_mgmt=WPA-PSK > wpa_passphrase=test1234 > > Thanks for any help, > vijaya > > _______________________________________________ > Hostap mailing list > Hostap@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/hostap _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap