我能够在 Ubuntu 22.04 上连接我家的 5GHz wifi（名称带有 _5G 后缀）。通过软件更新程序更新后，我的网络列表不再显示 5Ghz 网络。然后我将 Ubuntu 升级到 22.10，但这没有帮助。我能够在手机上连接该网络。
任何帮助都将不胜感激！
sudo iw reg get返回
global
country 00: DFS-UNSET
(755 - 928 @ 2), (N/A, 20), (N/A), PASSIVE-SCAN
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
(5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
(5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
phy#2
country 99: DFS-UNSET
(2402 - 2482 @ 40), (6, 20), (N/A)
(2474 - 2494 @ 20), (6, 20), (N/A)
(5140 - 5360 @ 160), (6, 20), (N/A)
(5460 - 5860 @ 160), (6, 20), (N/A)
sudo dmesg | grep brcm返回
[ 5.533569] usbcore: registered new interface driver brcmfmac
[ 5.646689] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac4356-pcie for chip BCM4356/2
[ 5.648555] brcmfmac 0000:04:00.0: Direct firmware load for brcm/brcmfmac4356-pcie.LENOVO-20F6CTO1WW.bin failed with error -2
[ 5.652769] brcmfmac 0000:04:00.0: Direct firmware load for brcm/brcmfmac4356-pcie.LENOVO-20F6CTO1WW.txt failed with error -2
[ 5.653284] brcmfmac 0000:04:00.0: Direct firmware load for brcm/brcmfmac4356-pcie.txt failed with error -2
[ 6.066649] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac4356-pcie for chip BCM4356/2
[ 6.072637] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4356/2 wl0: Aug 29 2019 02:05:27 version 7.35.180.197 (r722171 CY) FWID 01-4c8512f9
[ 6.441769] brcmfmac 0000:04:00.0 wlp4s0: renamed from wlan0
[ 6.443122] Bluetooth: hci0: BCM: 'brcm/BCM4356A2-0a5c-640e.hcd'
[ 6.443128] Bluetooth: hci0: BCM: 'brcm/BCM-0a5c-640e.hcd'
nmcli device wifi list返回
IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY
XXXXXXXXXXXXXXXXX Flugmodus Infra 1 130 Mbit/s 85 ▂▄▆█ WPA2
* XXXXXXXXXXXXXXXXX WLAN13402111 Infra 11 130 Mbit/s 80 ▂▄▆_ WPA2
XXXXXXXXXXXXXXXXX UPC52EFAB5 Infra 1 130 Mbit/s 77 ▂▄▆_ WPA1 WPA2
XXXXXXXXXXXXXXXXX WLAN14536499 Infra 1 130 Mbit/s 64 ▂▄▆_ WPA1 WPA2
XXXXXXXXXXXXXXXXX ZTE_D3D0E5 Infra 11 270 Mbit/s 60 ▂▄▆_ WPA2
XXXXXXXXXXXXXXXXX nugget Infra 1 270 Mbit/s 57 ▂▄▆_ WPA2
XXXXXXXXXXXXXXXXX UPC45E1A3A Infra 1 130 Mbit/s 52 ▂▄__ WPA1 WPA2
XXXXXXXXXXXXXXXXX Mariahilf Infra 6 130 Mbit/s 50 ▂▄__ WPA2
XXXXXXXXXXXXXXXXX UPCD3AF255 Infra 11 130 Mbit/s 49 ▂▄__ WPA1 WPA2
XXXXXXXXXXXXXXXXX WLAN11763610 Infra 11 130 Mbit/s 49 ▂▄__ WPA1 WPA2
XXXXXXXXXXXXXXXXX bongoverein aegidigasse Infra 6 270 Mbit/s 44 ▂▄__ WPA2
XXXXXXXXXXXXXXXXX UPC9426511 Infra 6 130 Mbit/s 42 ▂▄__ WPA1 WPA2
XXXXXXXXXXXXXXXXX Doenerbude Infra 4 270 Mbit/s 40 ▂▄__ WPA2
XXXXXXXXXXXXXXXXX -- Infra 4 270 Mbit/s 37 ▂▄__ WPA2
XXXXXXXXXXXXXXXXX Yallah Infra 8 130 Mbit/s 35 ▂▄__ WPA2
XXXXXXXXXXXXXXXXX Innonet-8000 Infra 9 270 Mbit/s 32 ▂▄__ WPA1 WPA2
XXXXXXXXXXXXXXXXX UPC9369407 Infra 6 130 Mbit/s 29 ▂___ WPA1 WPA2
XXXXXXXXXXXXXXXXX Drei_H288A_24G_96cF Infra 9 130 Mbit/s 22 ▂___ WPA2
国家代码 AT 设置为
/etc/default/crdasudo iwlist scan没有列出5G网络。-ThinkPad-X260:~$ sudo lshw -C network返回
*-network
description: Wireless interface
product: BCM4356 802.11ac Wireless Network Adapter
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlp4s0
version: 02
serial: 48:e2:44:93:29:dc
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=brcmfmac driverversion=7.35.180.197 firmware=01-4c8512f9 ip=192.168.0.52 latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:130 memory:f1400000-f1407fff memory:f1000000-f13fffff
*-network
description: Ethernet interface
product: Ethernet Connection I219-V
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: enp0s31f6
version: 21
serial: 50:7b:9d:eb:64:91
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.19.0-32-generic firmware=0.13-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:126 memory:f1600000-f161ffff
iw list结果
Wiphy phy0
wiphy index: 0
max # scan SSIDs: 10
max scan IEs length: 2048 bytes
max # sched scan SSIDs: 16
max # match sets: 16
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports roaming.
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
* AP
* P2P-client
* P2P-GO
* P2P-device
Band 1:
Capabilities: 0x1022
HT20/HT40
Static SM Power Save
RX HT20 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT TX/RX MCS rate indexes supported: 0-15
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] (20.0 dBm)
Band 2:
Capabilities: 0x1062
HT20/HT40
Static SM Power Save
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT TX/RX MCS rate indexes supported: 0-15
VHT Capabilities (0x0c015820):
Max MPDU length: 3895
Supported Channel Width: neither 160 nor 80+80
short GI (80 MHz)
SU Beamformer
SU Beamformee
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
VHT extended NSS: not supported
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:
* 5170 MHz [34] (20.0 dBm)
* 5180 MHz [36] (20.0 dBm)
* 5190 MHz [38] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5210 MHz [42] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5230 MHz [46] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)
* 5260 MHz [52] (20.0 dBm)
* 5280 MHz [56] (20.0 dBm)
* 5300 MHz [60] (20.0 dBm)
* 5320 MHz [64] (20.0 dBm)
* 5500 MHz [100] (20.0 dBm)
* 5520 MHz [104] (20.0 dBm)
* 5540 MHz [108] (20.0 dBm)
* 5560 MHz [112] (20.0 dBm)
* 5580 MHz [116] (20.0 dBm)
* 5600 MHz [120] (20.0 dBm)
* 5620 MHz [124] (20.0 dBm)
* 5640 MHz [128] (20.0 dBm)
* 5660 MHz [132] (20.0 dBm)
* 5680 MHz [136] (20.0 dBm)
* 5700 MHz [140] (20.0 dBm)
* 5720 MHz [144] (20.0 dBm)
* 5745 MHz [149] (20.0 dBm)
* 5765 MHz [153] (20.0 dBm)
* 5785 MHz [157] (20.0 dBm)
* 5805 MHz [161] (20.0 dBm)
* 5825 MHz [165] (20.0 dBm)
Supported commands:
* new_interface
* set_interface
* new_key
* start_ap
* join_ibss
* set_pmksa
* del_pmksa
* flush_pmksa
* remain_on_channel
* frame
* set_wiphy_netns
* set_channel
* start_sched_scan
* start_p2p_device
* connect
* disconnect
* crit_protocol_start
* crit_protocol_stop
* update_connect_params
WoWLAN support:
* wake up on disconnect
* wake up on magic packet
* wake up on pattern match, up to 8 patterns of 1-128 bytes,
maximum packet offset 1500 bytes
* can do GTK rekeying
* wake up on GTK rekey failure
* wake up on network detection, up to 16 match sets
software interface modes (can always be added):
valid interface combinations:
* #{ managed } <= 1, #{ P2P-device } <= 1, #{ P2P-client, P2P-GO } <= 1,
total <= 3, #channels <= 2
* #{ managed } <= 1, #{ AP } <= 1, #{ P2P-client } <= 1, #{ P2P-device } <= 1,
total <= 4, #channels <= 1
Device supports scan flush.
max # scan plans: 1
max scan plan interval: 508
max scan plan iterations: 0
Supported TX frame types:
* managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
Supported RX frame types:
* managed: 0x40 0xd0
* AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-client: 0x40 0xd0
* P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-device: 0x40 0xd0
Supported extended features:
* [ CQM_RSSI_LIST ]: multiple CQM_RSSI_THOLD records
* [ DFS_OFFLOAD ]: DFS offload