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Date: Tue, 21 Oct 2014 10:04:30 +0300
Message-ID: <CANUX_P1eb-C9yK-JGHgp_dc6uJzkDA=GYzKf+CFF50cqv0pVMQ@mail.gmail.com> (sfid-20141021_090437_452018_41398743)
Subject: Re: iwlwifi: Reason 7 periodic disconnect
From: Emmanuel Grumbach <egrumbach@gmail.com>
To: Krishna Chaitanya <chaitanya.mgit@gmail.com>
Cc: =?UTF-8?Q?Lauren=C8=9Biu_Nicola?= <lnicola@dend.ro>,
	Dan Williams <dcbw@redhat.com>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	Felix Fietkau <nbd@openwrt.org>
Content-Type: text/plain; charset=UTF-8
Sender: linux-wireless-owner@vger.kernel.org

On Tue, Oct 21, 2014 at 9:37 AM, Krishna Chaitanya
<chaitanya.mgit@gmail.com> wrote:
> On Tue, Oct 21, 2014 at 12:06 PM, Krishna Chaitanya
> <chaitanya.mgit@gmail.com> wrote:
>> On Tue, Oct 21, 2014 at 11:01 AM, Emmanuel Grumbach <egrumbach@gmail.com> wrote:
>>> On Tue, Oct 21, 2014 at 8:02 AM, Emmanuel Grumbach <egrumbach@gmail.com> wrote:
>>>> On Mon, Oct 20, 2014 at 10:29 PM, Laurențiu Nicola <lnicola@dend.ro> wrote:
>>>>> No, nothing in the DD-WRT syslog. The IP seems to be the one cached by
>>>>> my DHCP client. I also tried various suggestions found on the internet,
>>>>> but nothing helped.
>>>>>
>>>>
>>>> Can you please try to have another device in monitor mode to sniff the
>>>> traffic going on?
>>>> Felix, can you please tell me when DD-WRT can send a deauth with reason code 7?
>>>>
>>>> thanks.
>>>
>>> Can you please disable power save?
>>> For this, please make sure you have
>>> https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/iwlwifi-fixes.git/commit/?id=f8dfc607b2b460e8e8adfdfb3c5f5bba3a4ad01b
>>> or at least have the module parameter.
>>> I am wondering if the firmware is not sending frames because of power
>>> save toggling.
>>>
>>> I you could get more extensive logs from the AP it'd be great.
>>> Running tracing on the AP would let us know why it thinks we are not associated.
>>>
>> I have faced the same issue before it happens when DUT is in powersave
>> and for some reason AP authenticates (in this case probably due to
> *typo: deuauthenticates.
>
>> inactivity) but as DUT is in power save we don't Rx the deauth (some
>> AP's don't wait
>> for STA to wakeup and retrieve the deauth frame).
>>
>> So after that if DUT tries to sent any data frame, as it still thinks
>> that it is connected
>> (network lost also will not trigger because it still Rx beacon) and in
>> that case AP deauthenticates
>> us by Reason:7.
>>
>> May be if we enable tx status report ACK we can pass the inactivity
>> check as some AP's
>> wont reset inactivity timer for probe's.

That seems unlikely - we are kicked out after 1 minute?
Let's check, Laurentiu - can you please ping in the background and see
what happens?