hostapd error

[Ann Lo]

This is excellent information.

Thanks,
Ann

On Fri, Mar 25, 2016 at 5:49 PM, Ben Greear <greearb at candelatech.com> wrote:
> On 03/25/2016 05:24 PM, Ann Lo wrote:
>>
>> Hi Ben,
>>
>> Thanks for your information and suggestion. Using -dd option, there
>> are more information from hostapd, including:
>>
>> nl80211: Beacon set failed: -16 (Device or resource busy)
>>
>> Further investigation result is that this happens in the following
>> scenario:
>> 1) hostapd runs OK at channel 36 using 80 MHz width.
>> 2) wpa_supplicant (using the same radio) tries to connect to a remote
>> AP on channel 36 using 20 MHz width.
>> 3) hostapd is restarted at this point.
>> 4) When hostapd comes up again, it gets the above error.
>> 5) At this point, wpa_supplicant connects successfully.
>>
>> The radio requires AP and client using the same channel. Does this
>> mean that the channel width must be the same?
>
>
> Channel width does not need to be the same, but the primary channel
> must be.
>
> You probably need a patch I put into hostapd to force not switching
> the primary channel when running multiple interfaces on a single radio.
>
> https://github.com/greearb/hostap-ct/commit/cd25b893c97da95b5b7cda0e61ea7bcf5355bc16
>
>
> Thanks,
> Ben
>
> --
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>