我遇到了一个奇怪的问题，我的 Linux 机器只能在 5Ghz 频段连接到 WiFi 路由器，而在 2.4Ghz 上一切正常（但严重限制了互联网带宽）。我想这不是路由器的问题，因为我能够使用 5Ghz 频段全速连接我的 Galaxy Note 10。我怀疑这只是一个 Linux 配置问题。
我正在使用带有 5.8.0-41-generic 内核和 Broadcom BCM4360 802.11ac 无线网络适配器的 Ubuntu 20.10。
但让我们从头开始。我怀疑问题可能与切换到 Ubuntu 20.10 有关，但我不能 100% 确定。我发现韋斯特一些系统更新后设置被删除：
# iw reg get
global
country 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 get
global
country 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)
我的 WiFi 路由器的当前设置是：
2.4Ghz
802.11 Mode: Mixed (802.11b, 802.11g and 802.11n)
Channel: Auto (Current Ch. 1)
Bandwidth: Auto
Power: 100
5Ghz
802.11 Mode: Mixed (802.11a and 802.11n/ac)
Channel: Auto (Current Ch. 100/80)
Bandwidth: Auto
Power: 100
我认为下面列出的东西可能会有帮助：
# iw list
Wiphy 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
我将非常感激任何有关正在发生什么以及如何利用 5Ghz 频段的线索。
更新 #1的内容journal -f -u NetworkManager。请注意UPC241233881 是 2.4G和UPC501233881 是 5G，因此 00:57:23 成功连接到 2.4G，而在 00:59:12 我尝试连接到 5G。
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3259] device (wlp8s0): disconnecting for new activation request.
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3259] device (wlp8s0): state change: activated -> deactivating (reason 'new-activation', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3264] manager: NetworkManager state is now DISCONNECTING
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3288] audit: op="connection-activate" uuid="8a3a5695-d9bd-44ed-be63-3c92a72f2d72" name="UPC501233881" pid=1916 uid=1000 result="success"
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3527] device (wlp8s0): supplicant interface state: completed -> disconnected
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3541] device (wlp8s0): state change: deactivating -> disconnected (reason 'new-activation', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3910] dhcp4 (wlp8s0): canceled DHCP transaction
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3911] dhcp4 (wlp8s0): state changed bound -> done
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3958] manager: NetworkManager state is now DISCONNECTED
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3963] device (wlp8s0): Activation: starting connection 'UPC501233881' (8a3a5695-d9bd-44ed-be63-3c92a72f2d72)
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3983] device (wlp8s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3988] manager: NetworkManager state is now CONNECTING
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.3995] device (wlp8s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4000] device (wlp8s0): Activation: (wifi) access point 'UPC501233881' has security, but secrets are required.
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4001] device (wlp8s0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4035] device (wlp8s0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4039] device (wlp8s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4041] device (wlp8s0): Activation: (wifi) connection 'UPC501233881' has security, and secrets exist. No new secrets needed.
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4042] Config: added 'ssid' value 'UPC501233881'
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4042] Config: added 'scan_ssid' value '1'
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4042] Config: added 'bgscan' value 'simple:30:-70:86400'
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4042] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256'
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4042] Config: added 'auth_alg' value 'OPEN'
lut 09 00:59:12 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828752.4042] Config: added 'psk' value '<hidden>'
lut 09 00:59:16 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828756.4331] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 00:59:21 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828761.2314] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 00:59:21 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828761.3331] device (wlp8s0): supplicant interface state: associating -> associated
lut 09 00:59:21 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828761.3404] device (wlp8s0): supplicant interface state: associated -> 4way_handshake
lut 09 00:59:21 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828761.3525] device (wlp8s0): supplicant interface state: 4way_handshake -> group_handshake
lut 09 00:59:21 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828761.3558] device (wlp8s0): supplicant interface state: group_handshake -> disconnected
lut 09 00:59:21 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828761.4578] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 00:59:26 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828766.0846] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 00:59:26 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828766.1370] device (wlp8s0): supplicant interface state: associating -> disconnected
lut 09 00:59:26 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828766.6375] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 00:59:31 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828771.3011] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 00:59:31 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828771.3611] device (wlp8s0): supplicant interface state: associating -> disconnected
lut 09 00:59:32 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828772.3619] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 00:59:37 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828777.1410] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 00:59:37 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828777.1971] device (wlp8s0): supplicant interface state: associating -> disconnected
lut 09 00:59:37 PRZEDNICZEK01 NetworkManager[837]: <warn> [1612828777.5758] device (wlp8s0): Activation: (wifi) association took too long
lut 09 00:59:37 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828777.5758] device (wlp8s0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:37 PRZEDNICZEK01 NetworkManager[837]: <warn> [1612828777.5775] device (wlp8s0): Activation: (wifi) asking for new secrets
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9885] device (wlp8s0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9893] device (wlp8s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9898] device (wlp8s0): Activation: (wifi) connection 'UPC501233881' has security, and secrets exist. No new secrets needed.
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9898] Config: added 'ssid' value 'UPC501233881'
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9899] Config: added 'scan_ssid' value '1'
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9899] Config: added 'bgscan' value 'simple:30:-70:86400'
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9899] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256'
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9899] Config: added 'auth_alg' value 'OPEN'
lut 09 00:59:41 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828781.9899] Config: added 'psk' value '<hidden>'
lut 09 00:59:42 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828782.0264] device (wlp8s0): supplicant interface state: disconnected -> associating
lut 09 00:59:42 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828782.1339] device (wlp8s0): supplicant interface state: associating -> associated
lut 09 00:59:42 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828782.1454] device (wlp8s0): supplicant interface state: associated -> 4way_handshake
lut 09 00:59:42 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828782.1581] device (wlp8s0): supplicant interface state: 4way_handshake -> group_handshake
lut 09 00:59:42 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828782.1597] device (wlp8s0): supplicant interface state: group_handshake -> disconnected
lut 09 00:59:42 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828782.2633] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 00:59:56 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828796.8002] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 00:59:56 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828796.8569] device (wlp8s0): supplicant interface state: associating -> disconnected
lut 09 01:00:06 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828806.8801] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 01:00:07 PRZEDNICZEK01 NetworkManager[837]: <warn> [1612828807.5752] device (wlp8s0): Activation: (wifi) association took too long
lut 09 01:00:07 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828807.5752] device (wlp8s0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
lut 09 01:00:07 PRZEDNICZEK01 NetworkManager[837]: <warn> [1612828807.5774] device (wlp8s0): Activation: (wifi) asking for new secrets
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8551] device (wlp8s0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8555] device (wlp8s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8558] device (wlp8s0): Activation: (wifi) connection 'UPC501233881' has security, and secrets exist. No new secrets needed.
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8559] Config: added 'ssid' value 'UPC501233881'
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8559] Config: added 'scan_ssid' value '1'
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8559] Config: added 'bgscan' value 'simple:30:-70:86400'
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8559] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256'
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8559] Config: added 'auth_alg' value 'OPEN'
lut 09 01:00:09 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828809.8559] Config: added 'psk' value '<hidden>'
lut 09 01:00:11 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828811.6197] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 01:00:11 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828811.7263] device (wlp8s0): supplicant interface state: associating -> associated
lut 09 01:00:11 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828811.7346] device (wlp8s0): supplicant interface state: associated -> 4way_handshake
lut 09 01:00:11 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828811.7424] device (wlp8s0): supplicant interface state: 4way_handshake -> group_handshake
lut 09 01:00:11 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828811.7477] device (wlp8s0): supplicant interface state: group_handshake -> disconnected
lut 09 01:00:11 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828811.8476] device (wlp8s0): supplicant interface state: disconnected -> scanning
lut 09 01:00:27 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828827.4209] device (wlp8s0): supplicant interface state: scanning -> associating
lut 09 01:00:27 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828827.4810] device (wlp8s0): supplicant interface state: associating -> disconnected
lut 09 01:00:35 PRZEDNICZEK01 NetworkManager[837]: <warn> [1612828835.5791] device (wlp8s0): Activation: (wifi) association took too long
lut 09 01:00:35 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828835.5791] device (wlp8s0): state change: config -> failed (reason 'no-secrets', sys-iface-state: 'managed')
lut 09 01:00:35 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828835.5799] manager: NetworkManager state is now DISCONNECTED
lut 09 01:00:35 PRZEDNICZEK01 NetworkManager[837]: <warn> [1612828835.5816] device (wlp8s0): Activation: failed for connection 'UPC501233881'
lut 09 01:00:35 PRZEDNICZEK01 NetworkManager[837]: <info> [1612828835.5823] device (wlp8s0): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
更新2
在网络管理器中，有WPA 和 WPA2 个人版已选择选项，并且路由器已WPA-个人经过身份验证 =WPA2和加密 =高级加密标准 (AES)如下图所示：
答案1
查看你的 Linux 无线网卡支持的频率：
iwlist wlan0 freq# 将 wlan0 更改为你的无线网络设备名称
请注意支持的最高 5Ghz 频率。较高的通道比较低的通道效果更好。不要使用任何雷达探测通道。
转到路由器并更改 5Ghz 频道，然后将其从汽车达到第一步中找到的最高速率。重新检查您的 Linux 连接。
检查平板电脑的 5Ghz 连接性。如果需要，请更改路由器 5Ghz 通道，但要保持在 Linux 机器支持的无线网卡范围内。
更新＃1：
在您的 中iwlist wlp8s0 frequency，唯一匹配的 5Ghz 频道是 36 到 48，因此请将路由器的 5Ghz 频道设置为其中一个。
查看 /etc/default/crda。你在那里看到哪个国家代码？
答案2
我在使用 Zorin Lite 的 EliteBook 2570p [2012] 时也遇到了类似的问题。虽然网络可见，但机器可以连接到 2.4 GHz 网络，但无法连接到 5 GHz 网络。
解决方案是：在路由器中禁用 WPA2/WPA3 - 在 5GHz 频段使用 WPA1/WPA2