Trouble connecting to broadcom AC APs?

[Adrian Chadd]

.. right, but if you can reproduce it with ath10k in 11n only mode,
you can use an existing ath9k sniffer to sniff and see if there's
anything fruity in the frames.


-a


On 20 March 2014 16:27, Ben Greear <greearb at candelatech.com> wrote:
> On 03/20/2014 12:26 PM, Adrian Chadd wrote:
>> Is the broadcom ap doing sane or insane things with the sleep bits in
>> transmitted frames?
>>
>> Is this a problem with 11ac only?
>
> ath9k stations connect just fine, so it's either something with
> the ath10k (including our modified firmware), or the AP has issues
> with AC specifically.
>
> Thanks,
> Ben
>
>>
>>
>> -a
>>
>>
>> On 20 March 2014 12:23, Ben Greear <greearb at candelatech.com> wrote:
>>> On 03/20/2014 12:17 PM, Adrian Chadd wrote:
>>>> Did the per-rate transmit statistics ever make it into the firmware / driver?
>>>>
>>>> I'd start by looking at what rate(s) it's trying and what the transmit
>>>> completion statistics say. It could be doing something exceedingly
>>>> dumb like transmitting on an invalid rate or stream setup.
>>>>
>>>> Same deal with STBC/LDPC. Try disabling those; see what happens.
>>>
>>> It appears the packets get to the AP, and AP at least tries to
>>> respond.
>>>
>>> If we bring up stations one at a time instead of multiple at once
>>> it works better, and using ddwrt works better than stock firmware
>>> on the AP too.
>>>
>>> Anyone know how well monitor mode works on ath10k?  Would be nice
>>> to see what is actually on the air.
>>>
>>> Truth is, my main concern now is some issue with tx flush hanging,
>>> so it may be a bit until I can dig closely into the issues
>>> with the BCM APs.
>>>
>>> Thanks,
>>> Ben
>>>
>>>>
>>>>
>>>>
>>>> -a
>>>>
>>>>
>>>> On 20 March 2014 08:59, Ben Greear <greearb at candelatech.com> wrote:
>>>>> On 03/19/2014 11:36 PM, Kalle Valo wrote:
>>>>>> Ben Greear <greearb at candelatech.com> writes:
>>>>>>
>>>>>>> We are seeing various funny things when trying to connect
>>>>>>> ath10k stations to commercial APs with broadcom AC NICs.
>>>>>>>
>>>>>>> It sort of works sometimes, but we often see failure to
>>>>>>> acquire DHCP lease in a timely manner, etc.
>>>>>>
>>>>>> So it's a problem with broadcast frames? With or without encryption? Did
>>>>>> you try disabling power save?
>>>>>
>>>>> With and without encryption we see issues.  I am disabling power-save,
>>>>> but from poking around in firmware, I'm not sure how much affect that
>>>>> has.
>>>>>
>>>>> I'm using commands like this to disable it:
>>>>> ./local/sbin/iw dev sta219 set power_save off
>>>>>
>>>>>>> Similar testing on APs using QCA AC NICs appears to work
>>>>>>> much better.
>>>>>>>
>>>>>>> Our problems could be most anything, including the fact that this
>>>>>>> testing is done on our modified firmware, but I am curious if anyone
>>>>>>> else seems any similar issues?
>>>>>>
>>>>>> Occasionally I test connecting to D-Link DIR-865L in STA mode. But I
>>>>>> just do just simple ping tests and with manual IPs.
>>>>>
>>>>> We'll keep poking at things and see if we can find any
>>>>> pattern or work around.
>>>>>
>>>>> Thanks,
>>>>> Ben
>>>>>
>>>>> --
>>>>> Ben Greear <greearb at candelatech.com>
>>>>> Candela Technologies Inc  http://www.candelatech.com
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> ath10k mailing list
>>>>> ath10k at lists.infradead.org
>>>>> http://lists.infradead.org/mailman/listinfo/ath10k
>>>
>>>
>>> --
>>> Ben Greear <greearb at candelatech.com>
>>> Candela Technologies Inc  http://www.candelatech.com
>>>
>>
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>
>
> --
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>