Can't seem to use 5GHz APs with Intel wireless

[Adam]

On Sun, Jun 3, 2018 at 9:50 PM, Dhananjay Balan <mail at dbalan.in> wrote:

> On Sun, Jun 03, 2018 at 07:33:30PM +0200, Christoph Moench-Tegeder wrote:
>
> > Is the regdomain/country setting correct for your area and matches your
> > AP? Especially in the 5GHz band there are some "gaps" - not all channels
> > may be used in all countries (because of possible interference with
> > radar equipment and other stuff). See:
> > https://en.wikipedia.org/wiki/List_of_WLAN_channels#5_GHz_(
> 802.11a/h/j/n/ac/ax)
> >
>
> Thanks for taking time to explain.
>
> Turns out PEBKAC. I had this offending line burried in rc.conf
>
> create_args_wlan0="country DE regdomain FCC4"
>
> According to regdomain(5) <!-- FCC4 is 2.4GHz FCC w/ Public Safety Band
> (PSB) -->
>
> So I was forcing my card to do 2.4Ghz it seems, removed it - everything
> worked like charm. I can see and connect to 5GHz 11a aps.
>
> wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
> 1500
>         ether xxxx
>         inet 192.168.1.13 netmask 0xffffff00 broadcast 192.168.1.255
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: IEEE 802.11 Wireless Ethernet MCS mode 11na
>         status: associated
>         ssid xxxx channel 36 (5180 MHz 11a ht/40+) bssid xxxxxxxx
>         regdomain FCC country US authmode WPA2/802.11i privacy ON
>         deftxkey UNDEF TKIP 2:128-bit txpower 17 bmiss 10 mcastrate 6
>         mgmtrate 6 scanvalid 60 ampdulimit 64k ampdudensity 4 -amsdutx
> amsdurx
>         shortgi -stbc -ldpc wme roaming MANUAL
>
>
Thanks for the posting.  It appears I made some errors in my previous
response.  I'm using an iwm, not iwn.  And after your pointer I changed my
country to NO which then allows me to see, but not associate to 5gz.

Good yours is working.

-- 
Adam