RE: [CONF] enable 802.11AC in hostapd

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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
>
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