I have an quirky issue connecting my Linux machine to WiFi router only
on 5Ghz band, whereas on 2.4Ghz everything works fine(, but limiting the
internet bandwidth severly).
I suppose that's not router fault, because I'm able to connect my Galaxy
Note 10 using 5Ghz band at full speed. I suspect that is simply a Linux
configuration problem.
I'm using Ubuntu 20.10 with 5.8.0-41-generic kernel and Broadcom
BCM4360 802.11ac Wireless Network Adapter.
But let's start at the very beginning. I could suspect that the problem
may have someting with switching to Ubuntu 20.10, but I'm not in 100%
certain. I've discovered that *iw reg* setting was erased after some system
updates and retreats to *00* after every reboot:
*# iw reg getglobalcountry 00: DFS-UNSET (2402 - 2472 @ 40), (6, 20),
(N/A) (2457 - 2482 @ 20), (6, 20), (N/A), AUTO-BW, PASSIVE-SCAN (2474
- 2494 @ 20), (6, 20), (N/A), NO-OFDM, PASSIVE-SCAN (5170 - 5250 @ 80),
(6, 20), (N/A), AUTO-BW, PASSIVE-SCAN (5250 - 5330 @ 80), (6, 20), (0
ms), DFS, AUTO-BW, PASSIVE-SCAN (5490 - 5730 @ 160), (6, 20), (0 ms),
DFS, PASSIVE-SCAN (5735 - 5835 @ 80), (6, 20), (N/A), PASSIVE-SCAN
(57240 - 63720 @ 2160), (N/A, 0), (N/A)# iw reg set PL# iw reg
getglobalcountry PL: 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) (57000 -
66000 @ 2160), (N/A, 40), (N/A)*
The current settings of my WiFi router are:
*2.4Ghz802.11 Mode: Mixed (802.11b, 802.11g and 802.11n)Channel: Auto
(Current Ch. 1)Bandwidth: AutoPower: 1005Ghz802.11 Mode: Mixed (802.11a and
802.11n/ac)Channel: Auto (Current Ch. 100/80)Bandwidth: Auto*
*Power: 100*
By the way, I don't know why, but router country is fixed to: Irleand
(router was provided by polish cable company).
I think that listing below could be helpful:
*# iw listWiphy phy0 wiphy index: 0 max # scan SSIDs: 1 max scan
IEs length: 0 bytes max # sched scan SSIDs: 0 max # match sets: 0
max # scan plans: 1 max scan plan interval: -1 max scan plan
iterations: 0 Retry short limit: 7 Retry long limit: 4 Coverage
class: 0 (up to 0m) Supported Ciphers: * WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5) * TKIP (00-0f-ac:2) * CCMP-128
(00-0f-ac:4) * CMAC (00-0f-ac:6) Available Antennas: TX 0 RX 0
Supported interface modes: * IBSS * managed Band 1:
Bitrates (non-HT): * 1.0 Mbps * 2.0 Mbps (short
preamble supported) * 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported) * 6.0 Mbps
* 9.0 Mbps * 12.0 Mbps * 18.0 Mbps * 24.0
Mbps * 36.0 Mbps * 48.0 Mbps * 54.0 Mbps
Frequencies: * 2412 MHz [1] (20.0 dBm) * 2417
MHz [2] (20.0 dBm) * 2422 MHz [3] (20.0 dBm) * 2427
MHz [4] (20.0 dBm) * 2432 MHz [5] (20.0 dBm) * 2437
MHz [6] (20.0 dBm) * 2442 MHz [7] (20.0 dBm) * 2447
MHz [8] (20.0 dBm) * 2452 MHz [9] (20.0 dBm) * 2457
MHz [10] (20.0 dBm) * 2462 MHz [11] (20.0 dBm) * 2467
MHz [12] (20.0 dBm) * 2472 MHz [13] (20.0 dBm) * 2484
MHz [14] (disabled) Band 2: Bitrates (non-HT): * 6.0
Mbps * 9.0 Mbps * 12.0 Mbps * 18.0 Mbps
* 24.0 Mbps * 36.0 Mbps * 48.0 Mbps
* 54.0 Mbps Frequencies: * 5160 MHz [32] (23.0
dBm) * 5170 MHz [34] (23.0 dBm) * 5180 MHz [36] (23.0
dBm) * 5190 MHz [38] (23.0 dBm) * 5200 MHz [40] (23.0
dBm) * 5210 MHz [42] (23.0 dBm) * 5220 MHz [44] (23.0
dBm) * 5230 MHz [46] (23.0 dBm) * 5240 MHz [48] (23.0
dBm) * 5250 MHz [50] (disabled) * 5260 MHz [52] (20.0
dBm) (radar detection) * 5270 MHz [54] (20.0 dBm) (radar
detection) * 5280 MHz [56] (20.0 dBm) (radar detection)
* 5290 MHz [58] (20.0 dBm) (radar detection) * 5300 MHz
[60] (20.0 dBm) (radar detection) * 5310 MHz [62] (20.0 dBm)
(radar detection) * 5320 MHz [64] (20.0 dBm) (radar detection)
* 5330 MHz [66] (20.0 dBm) (radar detection) * 5340 MHz
[68] (20.0 dBm) (radar detection) * 5350 MHz [70] (disabled)
* 5360 MHz [72] (disabled) * 5370 MHz [74] (disabled)
* 5380 MHz [76] (disabled) * 5390 MHz [78] (disabled)
* 5400 MHz [80] (disabled) * 5410 MHz [82] (disabled)
* 5420 MHz [84] (disabled) * 5430 MHz [86] (disabled)
* 5440 MHz [88] (disabled) * 5450 MHz [90] (disabled)
* 5460 MHz [92] (disabled) * 5470 MHz [94] (disabled)
* 5480 MHz [96] (26.0 dBm) (radar detection) * 5490 MHz
[98] (26.0 dBm) (radar detection) * 5500 MHz [100] (26.0 dBm)
(radar detection) * 5510 MHz [102] (26.0 dBm) (radar
detection) * 5520 MHz [104] (26.0 dBm) (radar detection)
* 5530 MHz [106] (26.0 dBm) (radar detection) * 5540 MHz
[108] (26.0 dBm) (radar detection) * 5550 MHz [110] (26.0 dBm)
(radar detection) * 5560 MHz [112] (26.0 dBm) (radar
detection) * 5570 MHz [114] (26.0 dBm) (radar detection)
* 5580 MHz [116] (26.0 dBm) (radar detection) * 5590 MHz
[118] (26.0 dBm) (radar detection) * 5600 MHz [120] (26.0 dBm)
(radar detection) * 5610 MHz [122] (26.0 dBm) (radar
detection) * 5620 MHz [124] (26.0 dBm) (radar detection)
* 5630 MHz [126] (26.0 dBm) (radar detection) * 5640 MHz
[128] (26.0 dBm) (radar detection) * 5650 MHz [130] (26.0 dBm)
(radar detection) * 5660 MHz [132] (26.0 dBm) (radar
detection) * 5670 MHz [134] (26.0 dBm) (radar detection)
* 5680 MHz [136] (26.0 dBm) (radar detection) * 5690 MHz
[138] (26.0 dBm) (radar detection) * 5700 MHz [140] (26.0 dBm)
(radar detection) * 5710 MHz [142] (26.0 dBm) (radar
detection) * 5720 MHz [144] (disabled) * 5725 MHz
[145] (disabled) * 5730 MHz [146] (disabled) * 5735
MHz [147] (13.0 dBm) * 5740 MHz [148] (13.0 dBm) *
5745 MHz [149] (13.0 dBm) * 5750 MHz [150] (13.0 dBm)
* 5755 MHz [151] (13.0 dBm) * 5760 MHz [152] (13.0 dBm)
* 5765 MHz [153] (13.0 dBm) * 5770 MHz [154] (13.0 dBm)
* 5775 MHz [155] (13.0 dBm) * 5780 MHz [156] (13.0
dBm) * 5785 MHz [157] (13.0 dBm) * 5790 MHz [158]
(13.0 dBm) * 5795 MHz [159] (13.0 dBm) * 5800 MHz
[160] (13.0 dBm) * 5805 MHz [161] (13.0 dBm) * 5810
MHz [162] (13.0 dBm) * 5815 MHz [163] (13.0 dBm) *
5820 MHz [164] (13.0 dBm) * 5825 MHz [165] (13.0 dBm)
* 5830 MHz [166] (13.0 dBm) * 5840 MHz [168] (13.0 dBm)
* 5850 MHz [170] (13.0 dBm) * 5860 MHz [172] (13.0 dBm)
* 5870 MHz [174] (disabled) * 5880 MHz [176]
(disabled) * 5890 MHz [178] (disabled) * 5900 MHz
[180] (disabled) * 5910 MHz [182] (disabled) * 5920
MHz [184] (disabled) * 5930 MHz [186] (disabled) *
5940 MHz [188] (disabled) * 5950 MHz [0] (disabled) *
5960 MHz [2] (disabled) * 5970 MHz [4] (disabled) *
5980 MHz [6] (disabled) * 5990 MHz [8] (disabled) *
6000 MHz [10] (disabled) * 6010 MHz [12] (disabled) *
6020 MHz [14] (disabled) * 6030 MHz [16] (disabled) *
6040 MHz [18] (disabled) * 6050 MHz [20] (disabled) *
6060 MHz [22] (disabled) * 6070 MHz [24] (disabled) *
6080 MHz [26] (disabled) * 6090 MHz [28] (disabled) *
6100 MHz [30] (disabled) * 6110 MHz [32] (disabled) *
6120 MHz [34] (disabled) * 6130 MHz [36] (disabled) *
6140 MHz [38] (disabled) Supported commands: * set_interface
* new_key * join_ibss * set_pmksa *
del_pmksa * flush_pmksa * connect * disconnect
WoWLAN support: * wake up on disconnect * wake up on magic
packet * can do GTK rekeying * wake up on GTK rekey
failure * wake up on EAP identity request software interface
modes (can always be added): interface combinations are not supported
Device supports scan flush.*
* Supported extended features:*
# iwlist wlp8s0 frequency
wlp8s0 32 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 14 : 2.484 GHz
Channel 36 : 5.18 GHz
Channel 38 : 5.19 GHz
Channel 40 : 5.2 GHz
Channel 42 : 5.21 GHz
Channel 44 : 5.22 GHz
Channel 46 : 5.23 GHz
Channel 48 : 5.24 GHz
Channel 52 : 5.26 GHz
Channel 56 : 5.28 GHz
Channel 60 : 5.3 GHz
Channel 64 : 5.32 GHz
Channel 100 : 5.5 GHz
Channel 104 : 5.52 GHz
Channel 108 : 5.54 GHz
Channel 112 : 5.56 GHz
Channel 116 : 5.58 GHz
Channel 120 : 5.6 GHz
Channel 124 : 5.62 GHz
Of course, I've tried to assign several channels manually (those without
radar detection), but without any result.
I would appreciate any clues what is happening and how to utilize 5Ghz band.
Your sincerely
Adam Przedniczek
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