Início / ubuntu / Perguntas / 1495716
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stumblebee
Asked: 2023-12-12 10:06:39 +0800 CST

Por que tenho desconexões intermitentes de Wi-Fi no Ubuntu 20.04.6?

  • 772

Estou usando o Ubuntu 20.04.6 e tenho enfrentado desconexões intermitentes de Wi-Fi durante as quais meu ícone de Wi-Fi se transforma em um ponto de interrogação.

Consegui obter todas as informações abaixo antes que meu WIFI fosse reconectado automaticamente:

  • Saída de ifconfig -a:

    eno1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether ec:8e:b5:45:a7:27  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 96567  bytes 8206625 (8.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 96567  bytes 8206625 (8.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlo1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.20  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 2606:a800:cf85:1a00:76e6:5d29:86fc:8d7e  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::20fc:fa07:8117:1c33  prefixlen 64  scopeid 0x20<link>
        inet6 2606:a800:cf85:1a00:c56d:f38c:137a:80e1  prefixlen 64  scopeid 0x0<global>       ether 40:49:0f:48:d6:94  txqueuelen 1000  (Ethernet)
        RX packets 1558979  bytes 1007454192 (1.0 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 918856  bytes 168900180 (168.9 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

  • Saída de ping 192.168.0.1(este é o IP do meu roteador):

    PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
From 192.168.0.20 icmp_seq=1 Destination Host Unreachable
From 192.168.0.20 icmp_seq=2 Destination Host Unreachable
From 192.168.0.20 icmp_seq=3 Destination Host Unreachable
From 192.168.0.20 icmp_seq=4 Destination Host Unreachable
^C
--- 192.168.0.1 ping statistics ---
6 packets transmitted, 0 received, +4 errors, 100% packet loss, time 5065ms
pipe 3

  • Saída de service network-manager status:

    ● NetworkManager.service - Network Manager
     Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2023-12-09 15:42:03 EST; 7h ago
       Docs: man:NetworkManager(8)
   Main PID: 799 (NetworkManager)
      Tasks: 3 (limit: 4485)
     Memory: 10.2M
     CGroup: /system.slice/NetworkManager.service
             └─799 /usr/sbin/NetworkManager --no-daemon

Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6390] dhcp4 (wlo1): option requested_rfc3442_classless_static_routes => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6390] dhcp4 (wlo1): option requested_root_path  => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6391] dhcp4 (wlo1): option requested_routers    => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6391] dhcp4 (wlo1): option requested_static_routes => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6392] dhcp4 (wlo1): option requested_subnet_mask => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6392] dhcp4 (wlo1): option requested_time_offset => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6392] dhcp4 (wlo1): option requested_wpad       => '1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6393] dhcp4 (wlo1): option routers              => '192.168.0.1'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6393] dhcp4 (wlo1): option subnet_mask          => '255.255.255.0'
Dec 09 22:54:51 ubuntu20 NetworkManager[799]: <info>  [1702180491.6393] dhcp4 (wlo1): state changed extended -> extended

  • Saída de iwconfig:

    wlo1      IEEE 802.11  ESSID:"patawad"
          Mode:Managed  Frequency:2.437 GHz  Access Point: C0:C5:22:4C:9E:D0
          Bit Rate=54 Mb/s   Tx-Power=20 dBm
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
          Link Quality=64/70  Signal level=-46 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:4   Missed beacon:0

  • Saída de nmcli dev wifi:

    IN-USE  BSSID              SSID              MODE   CHAN  RATE        SIGNAL  BARS  SECURITY
*       C0:C5:22:4C:9E:D0  patawad           Infra  6     54 Mbit/s   100     ▂▄▆█  WPA1 WPA2
        94:18:65:49:D5:1B  skeetswifi_2GEXT  Infra  6     270 Mbit/s  67      ▂▄▆_  WPA2
        6C:AE:F6:C5:CC:64  9755a8            Mesh   6     270 Mbit/s  67      ▂▄▆_  WPA3
        6C:AE:F6:C5:CC:67  skeetswifi        Infra  6     270 Mbit/s  67      ▂▄▆_  WPA2
        6C:AE:F6:C5:CC:6A  --                Infra  6     270 Mbit/s  67      ▂▄▆_  --

  • E por último, o log da rede antes da falha em 09 de dezembro 21:22:35 ( <warn>):

    $ sudo journalctl -b 0 -u NetworkManager
Dec 09 21:09:51 ubuntu20 NetworkManager[799]: <info>  [1702174191.6197] dhcp4 (wlo1): option routers              => '192.168.0.1'
Dec 09 21:09:51 ubuntu20 NetworkManager[799]: <info>  [1702174191.6198] dhcp4 (wlo1): option subnet_mask          => '255.255.255.0'
Dec 09 21:09:51 ubuntu20 NetworkManager[799]: <info>  [1702174191.6198] dhcp4 (wlo1): state changed extended -> extended
Dec 09 21:22:35 ubuntu20 NetworkManager[799]: <warn>  [1702174955.9205] sup-iface[0x557d363c1920,wlo1]: connection disconnected (reason -4)
Dec 09 21:22:35 ubuntu20 NetworkManager[799]: <info>  [1702174955.9537] device (wlo1): supplicant interface state: completed -> disconnected
Dec 09 21:22:35 ubuntu20 NetworkManager[799]: <info>  [1702174955.9538] device (p2p-dev-wlo1): supplicant management interface state: completed -> disconnected
Dec 09 21:22:36 ubuntu20 NetworkManager[799]: <info>  [1702174956.0225] device (wlo1): supplicant interface state: disconnected -> scanning
Dec 09 21:22:36 ubuntu20 NetworkManager[799]: <info>  [1702174956.0228] device (p2p-dev-wlo1): supplicant management interface state: disconnected -> scanning
Dec 09 21:22:36 ubuntu20 NetworkManager[799]: <info>  [1702174956.9985] device (wlo1): supplicant interface state: scanning -> authenticating
Dec 09 21:22:36 ubuntu20 NetworkManager[799]: <info>  [1702174956.9986] device (p2p-dev-wlo1): supplicant management interface state: scanning -> authenticating

Por que meu Wi-Fi é desconectado?

networking

1 respostas

  1. Best Answer

    A julgar por este trecho da sua iwconfigsaída:

    wlo1      IEEE 802.11  ESSID:"patawad"
          Mode:Managed  Frequency:2.437 GHz  Access Point: C0:C5:22:4C:9E:D0
          Bit Rate=54 Mb/s   Tx-Power=20 dBm

    Parece que você está executando 2,4 GHz, 54 Mb/s, o que equivale a IEEE 802.11g-2003 (WiFi 3) .

    Este padrão tem 20 anos e, por razões de segurança e desempenho, recomendo fortemente que você atualize seu ponto de acesso WiFi para pelo menos WiFi 5 ou 6, que deve funcionar melhor para sistemas modernos, incluindo Ubuntu.

    • 2

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