CURRENT: ath0: stuck beacon; resetting (bmiss count 4)

[O. Hartmann]

Am Fri, 03 Oct 2014 15:15:54 +0200
Erik Trulsson <Erik.Trulsson.1013 at student.uu.se> schrieb:

> Quoting "O. Hartmann" <ohartman at 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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