Hi, Thanks for your answer My dongle is working 5GHz band with the configuration below : hw_mode=a channel=48 ieee80211ac=1 vht_oper_chwidth=0 vht_capab=[MAX-MPDU-11454][SHORT-GI-40][RXLDPC][TX-STBC-2BY1][RX-STBC-1] vht_oper_centr_freq_seg0_idx=48 I do want to use a 40MHz channel since there is no information about 80MHz in AP mode for my dongle. Hostapd doesn't launch with vht_oper_chwidth=1 in my configuration file. I understand from what you said that could explain why some devices can not connect whereas my Nexus 5 can. So I need to correct my conf file like this : hw_mode=a channel=48 ieee80211ac=1 vht_oper_chwidth=0 vht_capab=[MAX-MPDU-11454][SHORT-GI-40][RXLDPC][TX-STBC-2BY1][RX-STBC-1] vht_oper_centr_freq_seg0_idx=0 >> >> Completing interface initialization >> Mode: IEEE 802.11a Channel: 36 Frequency: 5180 MHz >> DFS 0 channels required radar detection >> Could not set channel for kernel driver > >> ### hostapd configuration file >> hw_mode=a >> channel=36 > >> ieee80211ac=1 >> vht_oper_chwidth=0 > > That would imply that you are trying to configure this to use a 40 MHz > channel. Is that on purpose? Or was this supposed to be > vht_oper_chwidth=1 for a 80 MHz VHT channel? > >> vht_oper_centr_freq_seg0_idx=42 > > 42 would be the centered frequency center channel number for 36 primary > channel only if this were a 80 MHz channel, so the combination here is > invalid. You would either need to change this to use vht_oper_chwidth=1 > or set vht_oper_centr_freq_seg0_idx=0 if you want to use a 40 MHz > channel. > > -- > Jouni Malinen PGP id EFC895FA > > _______________________________________________ > Hostap mailing list > Hostap@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/hostap _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
