Hi
Recently I’ve been trying to resolve puzzle why my laptop shows me this with openwrt dlink AP:
iw reg get
global
country CZ: DFS-ETSI
(2400 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
(5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
(5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
(5725 - 5875 @ 80), (N/A, 13), (N/A)
(5945 - 6425 @ 320), (N/A, 23), (N/A), NO-OUTDOOR
(57000 - 66000 @ 2160), (N/A, 40), (N/A)
phy#2 (self-managed)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 20), (N/A, 20), (N/A), PASSIVE-SCAN
(5170 - 5330 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5490 - 5730 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5735 - 5895 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5925 - 7125 @ 160), (N/A, 30), (N/A), NO-OUTDOOR, AUTO-BW
While when I’ve connecting in the work office with some expensive Cisco AP - I’m getting proper list:
iw reg get
global
country CZ: DFS-ETSI
(2400 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
(5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
(5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
(5725 - 5875 @ 80), (N/A, 13), (N/A)
(5945 - 6425 @ 320), (N/A, 23), (N/A), NO-OUTDOOR
(57000 - 66000 @ 2160), (N/A, 40), (N/A)
phy#1 (self-managed)
country CZ: DFS-ETSI
(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), NO-OUTDOOR, DFS, AUTO-BW
(5490 - 5590 @ 80), (N/A, 30), (0 ms), DFS, AUTO-BW
(5590 - 5650 @ 40), (N/A, 30), (600000 ms), DFS, AUTO-BW
(5650 - 5710 @ 40), (N/A, 30), (0 ms), DFS, AUTO-BW
(5735 - 5855 @ 80), (N/A, 14), (N/A), AUTO-BW
(5855 - 5875 @ 20), (N/A, 14), (N/A), AUTO-BW
(5945 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
So in the office - it’s properly getting CZ region.
I assume it’s because when I’m on openwrt - scan gives me:
Country: CZ Environment: Indoor/Outdoor
Channels [36 - 48] @ 23 dBm
Channels [52 - 64] @ 20 dBm
Channels [100 - 140] @ 26 dBm
Channels [144 - 144] @ 0 dBm
Channels [149 - 173] @ 13 dBm
while office router gives:
Country: CZ Environment: Indoor/Outdoor
Channels [36 - 64] @ 23 dBm
Channels [100 - 140] @ 30 dBm
Channels [149 - 165] @ 14 dBm
So it looks like (with help of Gemini) there is some mismatch in regulatory.db description for CZ.
This link like gives usable channels in an easy to see way (in Czech though):
Here is official government doc:
Where channels 36-64, 100-140 seems to be ‘safe’ others likely not - especially not 144.
Anyway - I’m not an expert in this territory - I’m just curious why ‘iw reg get’ is not reporting proper region on my Lenovo P16 with ath11k WiFi chip set.
There are likely more things to fix on the road - but this regulatory mismatch is one minor thing on the road.
Obviously my 5G wifi connection otherwise works.