Odd WiFi Issue

[Akoellh]

Originally Posted by oldcpu

A note of caution, that probably will NOT work on 11.2 as the file naming convention inside the /etc/modprobe.d/ directory is changing between 11.1 and 11.2.

Yes and no.

Yes, it will not work on 11.2 because the file will be ignored as it does not end with ".conf".

No, one should not use that method at all on 11.2 (i.e. by renaming that file to cfg80211.conf) because this will not work on 11.2 and even prevent the module cfg80211 from loading.

The newer kernels will use crda/iw/wireless-regdb for setting regulatory domains instead of a module option.

[lwfinger]

Akoellh wrote:
> oldcpu;2057357 Wrote:
>> A note of caution, that probably will NOT work on 11.2 as the file
>> naming convention inside the /etc/modprobe.d/ directory is changing
>> between 11.1 and 11.2.
>
> Yes and no.
>
> Yes, it will not work on 11.2 because the file will be ignored as it
> does not end with ".conf".
>
> No, one should not use that method at all on 11.2 (i.e. by renaming
> that file to cfg80211.conf) because this will not work on 11.2 and even
> prevent the module cfg80211 from loading.
>
> The newer kernels will use crda/iw/wireless-regdb for setting
> regulatory domains instead of a module option.

The recommended way is to put the line
"options cfg80211 ieee80211_regdom=XX", where XX is your country code,
into the file /etc/modprobe.conf.local. That information will be used
by cfg80211 when it interrogates the wireless-regdb database. If crda
is not implemented, then the pseudo-country "EU" can be used, but
please change it to your real country if/when you go to 11.2. The
regdb contains a lot more than allowed channels. It also has maximum
power, etc.

As to choosing a channel to avoid interference, please remember that
wireless is not like TV. The channels are spaced 5 MHz apart, but the
channel width for 802.11g is 40 MHz and there is overlap. You can do
the math, but the conclusion is that only channels 1, 6, and 11 do not
overlap. Your best choice is to find which of these has the least
interference and choose it.