After shutdown/restart, ath10k sometimes stops receiving packets

Kalle Valo kvalo at
Sat Jun 14 22:45:34 PDT 2014

Avery Pennarun <apenwarr at> writes:

> On Sat, Jun 14, 2014 at 12:45 PM, Kalle Valo <kvalo at> wrote:
>> Avery Pennarun <apenwarr at> writes:
>>> We are experiencing a relatively-rare-but-not-rare-enough case which
>>> has approximately these steps:
>>> - run a wifi AP for a while with a station or two connected
>>> - shut down hostapd (stations all get disconnected of course)
>>> - restart hostapd (perhaps on another channel or with different settings)
>>> After that, an external wifi sniffer can see beacons being transmitted
>>> by the AP as expected, but all packets from stations trying to connect
>>> are ignored.
>> Do you have any guesses how often this happens? Once a day, once a week?
> Someone in our QA group seems to be able to produce it after two or
> three test runs with Veriwave.  Before each run, he stops and restarts
> hostapd.

That's quite often. Was he testing DFS or something else? Maybe this is
related to radar detection or channel switching?

Kalle Valo

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