[ath9k-devel] AR9380 + hostapd + HT over 802.11a

[Mihai Moldovan <ionic@ionic.de>]

Hey all,

I'm having a "problem" again. ;)

Today I got my AR9380 card and wanted to set it up on 802.11a (5GHz) 
with HT40 (802.11n).

Although enabling 802.11d and setting the regulatory domain to "DE" 
(Germany), I wasn't able to bring up the card on any 5GHz channel in AP 
mode.

Finding some "patch" for ath9k which disabled NO_IBSS, RADAR_SCANNING 
and PASSIVE_SCAN, I was able to bring the card up on 5GHz with HT (and 
finally get 300MBit max rate.)

I feel that's the wrong approach and would like to ask how to really do 
this kind of stuff.

Also: as the card is currently running on 5GHz, I'd like to put another 
card up running on 2.4GHz for legacy hardware not capable of 802.11a 
(for instance my Android phone.)

Is there anything I should pay attention to? For instance using another 
ESSID and (naturally) using some 2.4GHz channel. In my experience, 
running two cards on the same ESSID on different channels doesn't work 
well and confuses STAs, leading to connection drops and unrecoverable 
states.

Any help is highly appreciated.

Best regards,


Mihai

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