[PATCH 0/3] hostapd: introduce Automatic Channel Selection (ACS)

Andreas Hartmann andihartmann
Sun Aug 25 01:32:04 PDT 2013

Andreas Hartmann wrote:
> Andreas Hartmann wrote:
>> Michal Kazior wrote:
>>> Hi,
>>> This is an attempt at ressurecting ACS effort for hostapd.
>>> This is based on the work done by Luis R. Rodriguez
>>> <lrodriguez at qca.qualcomm.com>.
>> I tested it, too with ath9k (AR9300). It's working pretty fine for me
>> (at a first glance).
> Well, the second glance shows a problem on boot up of the machine: I'm
> always getting an error on channel 13 with the noise floor:
> 1377411942.774908: ACS: Survey is missing noise floor
> 1377411942.774913: ACS: Channel 13 has insufficient survey data
> Restarting hostapd w/o unloading wireless modules stack "resolves" the
> problem.

The same problem can be seen with ar9285 running linux 3.10.5. The last
channel of the allowed list has the same error as described above when
run at the first time after loading the wireless modules. Seems to be a
basic problem.


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