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Date:      Fri, 3 Oct 2014 10:55:21 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        "O. Hartmann" <ohartman@zedat.fu-berlin.de>
Cc:        FreeBSD CURRENT <freebsd-current@freebsd.org>, Erik Trulsson <Erik.Trulsson.1013@student.uu.se>
Subject:   Re: CURRENT: ath0: stuck beacon; resetting (bmiss count 4)
Message-ID:  <CAJ-VmomAkdf_xW359Nd3bD6dro1GzOZf%2B00%2BcUBeEfa-wR_W-g@mail.gmail.com>
In-Reply-To: <20141003153306.0e0db45c.ohartman@zedat.fu-berlin.de>
References:  <20141003145403.704e85be.ohartman@zedat.fu-berlin.de> <20141003151554.19434wd2pn8bwlu2@webmail.uu.se> <20141003153306.0e0db45c.ohartman@zedat.fu-berlin.de>

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I think you're going to be .. unhappy with what Intel's firmware is
like as an AP.

I still have to chase down why the AR9287 stalls and do a full chip
reset when it goes RX deaf. I'm just chasing down other things at the
moment.


-a


On 3 October 2014 06:33, O. Hartmann <ohartman@zedat.fu-berlin.de> wrote:
> Am Fri, 03 Oct 2014 15:15:54 +0200
> Erik Trulsson <Erik.Trulsson.1013@student.uu.se> schrieb:
>
>> Quoting "O. Hartmann" <ohartman@zedat.fu-berlin.de>:
>>
>> > Since a couple of days I get this weird console-and-log-spamming message:
>> >
>> > ath0: stuck beacon; resetting (bmiss count 4)
>> >
>> > The machine in question is running the most recent CURRENT right now:
>> >
>> > FreeBSD 11.0-CURRENT #2 r272471: Fri Oct  3 13:03:58 CEST 2014 amd64
>> >
>> > and the box acts as a gateway with WiFi access point via hostapd and
>> > this WiFi hardware:
>> >
>> > [...]
>> > ath0: <Atheros 9287> mem 0xf7e00000-0xf7e0ffff irq 16 at device 0.0 on pci1
>> > ath0: [HT] enabling HT modes
>> > ath0: [HT] enabling short-GI in 20MHz mode
>> > ath0: [HT] 1 stream STBC receive enabled
>> > ath0: [HT] 1 stream STBC transmit enabled
>> > ath0: [HT] 2 RX streams; 2 TX streams
>> > [...]
>> > ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0
>> >
>> > What is this and how can I get rid of it?
>>
>> It means that you have run into a well-known and long lasting hardware
>> bug in Atheros Wifi chipsets, where they sometimes get stuck and stops
>> sending out beacons.
>> You get that message when the device driver detects that this has
>> happened and resets the chip to get things going again.
>>
>> There is, AFAIK, no way of making sure the problem cannot happen, but
>> you might be able to reduce the frequency of it happening by reducing
>> the amount of interference you receive from other wireless devices.
>
> Ah, I understand, so nothing to worry about. The WiFi NIC is a cheap TP Link facility.
> Hopefully, FreeBSD will have support for Intel's Dual Band 7260-chipset this decade, so
> the problem will be gone anyway (except Intel put also nice hardware bugs into their
> silica ...).
>
>
> oh



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