Hostapd does not support 5Ghz config, but my card does

Philip Prindeville philipp_subx
Thu Aug 19 12:59:48 PDT 2010

  On 8/18/10 2:29 PM, Philip Prindeville wrote:
>    On 5/19/10 2:18 PM, Jouni Malinen wrote:
>> On Wed, May 19, 2010 at 04:01:49PM +0200, Laurent B wrote:
>>> I'm having problems setting up hostapd 0.7.2 in order to run 5ghz band in N
>>> mode
>> hostapd itself would be fine with 5 GHz configuration, but the driver
>> does not allow it to be used for AP mode and hostapd will follow
>> whatever the driver tells it in this context.
> I'm seeing exactly the same issue, with the same card.
> I'm running Fedora updated (
> What's the workaround?  Running the card in "hw_mode=b"?
> Thanks.

Using "hw_mode=b" didn't seem to make a difference (I was using channel=11 anyway).

I installed compat-wireless-2010-08-19 and this problem went away, but two others appeared instead.

Seeing warnings that "Illegal nla->nla_type == 0" in both "iw list" and when starting hostapd, and hostapd sees "Unknown event 5".


>>> For me the ath9k module is ok as I can do a "iwconfig chan 48" (see below)
>> I would assume this is only for a passive mode in which no frames are
>> transmitted without an AP being there first, not for a mode where the
>> card would be transmitted Beacon frames on its own..
>>> wlan1: IEEE 802.11 Configured channel (48) not found from the channel list
>>> of current mode (2) IEEE 802.11a
>> This indicates that the driver did not allow AP mode on the specified
>> channel (either because of the channel not being supported at all or
>> because of beaconing not being supported on it).
>>> wifiap:/lib/modules# iw reg get
>> This will only give you list of generic regulatory rules for the
>> country; use "iw list" to see more detailed information that the driver
>> provides (no-IBSS and DFS/radar detection flags prevent hostapd from
>> using the channel).

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