hostapd error

[Ann Lo]

Hi Ben,

Your patch works like a charm. The hostapd problem is fixed.

Thanks,
Ann

On Fri, Mar 25, 2016 at 5:55 PM, Ann Lo <annlo.tech at gmail.com> wrote:
> 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
>>