Control: tags -1 + moreinfo Hi
On Wednesday 04 September 2013, Martin Hodges wrote:
[…]
> Dear Maintainer,
> Stumbled across while migrating the home server from lenny to Wheezy.
>
> I live in Norway and few people use channel 13, so I do.
>
> Only listing modules in /etc/modules did not help.
> In addition: Calling 'iw set reg NO' in /etc/network/interfaces under section
> for wlan0 helped.
>
> when the error is present:
> The call to CRDA seems to comes after the channel setting is performed.
> Trying to set to CH13 before changing the country to Norway will not work
[…]
I haven't quite understood how, and in which order, you're calling
(explicitly or implicity be system events) crda, could you please
clarify that a bit?
What you'd usually do, is configuring CRDA:
/etc/default/crda:
REGDOMAIN=NO
In addition you'd configure hostapd:
$DEAMON_CONF (hostapd.conf):
country_code=NO
Keep in mind that your kernel also receives external hints to update
and intersect the active regulatory domain, be it by your device's
EEPROM/ OTP (this is particularly valid for Atheros devices[1]) or that
is might even receive country IEs (IEEE 802.11d) from access points
nearby. So it is a bit hard to guess what goes wrong on your system,
without further information. Fortunately dmesg usually tells a pretty
good story about all regulatory hints received and how they arrived.
Useful information to debug this:
- full dmesg output since the system booted
- /sbin/iw reg get
- /sbin/iw list
Regards
Stefan Lippers-Hollmann
[1] http://wireless.kernel.org/en/users/Drivers/ath#Regulatory
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