so as I said to glen on IRC.

The first possible issue here is that the NIC just disappears for some
reason and all register reads are 0xffffffff. it's not that.

The second possibility is that it's asleep - and no, NIC reads aren't
showing 0xdeadc0de, 0xdeadbeef, etc. So no, it's not that.

The fact that calibration fails like it does tends to indicate there's
some kind of noise spur from somewhere that's pissing the NIC off.
It's difficult to establish that without writing code to do
capture/dump the raw ADC samples.

He's also recently opened up his laptop and fiddled around.

he's going off to do some more testing.


On 20 December 2013 18:39, Glen Barber <g...@freebsd.org> wrote:
> On Fri, Dec 20, 2013 at 09:35:58PM -0500, Glen Barber wrote:
>> Hi,
>> Since last upgrade, it seems every few days (it seems roughly every
>> 2 days), my ath(4) disappears, or more specifically, "falls off" enough
>> to be unusable.
> Adrian pointed out that I forgot to include actually relevant
> information.
> Machine runs .0-CURRENT r258761, the wireless card info from dmesg.boot
> is:
> ath0: <Atheros 9285> mem 0xde800000-0xde80ffff irq 17 at device 0.0 on
> pci2
> ath0: [HT] enabling HT modes
> ath0: [HT] 1 stream STBC receive enabled
> ath0: [HT] 1 RX streams; 1 TX streams
> ath0: AR9285 mac 192.2 RF5133 phy 14.0
> ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0
> Glen
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