It seems you are already pissed off, but could you please reply inline instead of top posting. Its a drag to scroll up and down.

On 4/12/2018 7:05 PM, solsTiCe d'Hiver wrote:
Hi.

I thought I made myself clear.
I leave in France. My system(s) is/are set up to use FR as default
regulatory domain.

But when I plug in that tp-link card, I am restricted to use CN
regulatory domain. Why am I the only one to see this as a problem ?

unlikely you are the only one.

I know that one can only have one regdom defined on the system. I have
set it up myself. So why is it changed behind my back by some card or
whatever ?

so:
        Alfa = rt2800usb = FR
> country FR: DFS-ETSI
> (2402 - 2482 @ 40), (N/A, 20), (N/A)
> (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW
> (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
> (5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
> (57000 - 66000 @ 2160), (N/A, 40), (N/A)
        TP-Link = ath9k_htc = CN
>country CN: DFS-FCC
> (2402 - 2482 @ 40), (N/A, 20), (N/A)
> (5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
> (5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW
> (5735 - 5835 @ 80), (N/A, 30), (N/A)
> (57240 - 59400 @ 2160), (N/A, 28), (N/A)
> (59400 - 63720 @ 2160), (N/A, 44), (N/A)
> (63720 - 65880 @ 2160), (N/A, 28), (N/A)

The FR setting may or may not be your doing. You seem to indicate having done 'iw reg set FR'. So as to why it changed behind your back is because that card indicates it is certified to work in CN regulatory domain and your system is configure to work in FR domain. So the regulatory code in the kernel has to take action and as Steve explains it creates an intersection domain named '98'.

> country 98: DFS-UNSET
> (2402 - 2482 @ 40), (N/A, 20), (N/A)
> (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW
> (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
> (57240 - 59400 @ 2160), (N/A, 28), (N/A)
> (59400 - 63720 @ 2160), (N/A, 40), (N/A)
> (63720 - 65880 @ 2160), (N/A, 28), (N/A)

So it is not as you say that your Alfa device now operates in CN domain, but in the 98 domain. As you can see it creates rules different from FR and CN picking the lowest power of the two.

Like I said, I am left with the option, to disable crda, or to use 2
systems, one for each card !

So yeah, plugging multiple cards in a system limits your options, but you still have channels to operate in unless you are otherwise restricted by AP(s) used.

Regards,
Arend

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