WIFI 连接随机但有规律地断开

2024-6-4 • tag-icon

几周以来，我的 WIFI 连接会Centrino Wireless-N 2230随机Ubuntu 18.04但有规律地断开。在这种状态下，无线符号变成了问号 - 表示连接已过时。这很烦人，因为自动或手动触发的重新连接可能需要几分钟。在此期间，会弹出 WIFI 连接对话框，其中填充了凭据。但确认此对话框并不能成功重新连接。值得注意的事实是，在过时模式下，此特定 WIFI 连接的“安全”选项卡中的 WIFI 凭据有时会消失。重启后，凭据会恢复。我真的无法隔离问题空间。我可能需要帮助来找到根本原因。我需要提供什么来帮助隔离和调试？

核心

wlp2s0: disassociated from 38:10:d5:7b:bd:05 (Reason: 1=UNSPECIFIED)

日志

连接断开期间的系统日志

启动阶段的内核消息

$ dmesg | grep wlp2s0
[   42.378817] iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0
[   62.596785] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[   62.948957] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[   63.043488] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[   63.620989] wlp2s0: authenticate with 38:10:d5:7b:bd:05
[   63.624181] wlp2s0: send auth to 38:10:d5:7b:bd:05 (try 1/3)
[   63.626760] wlp2s0: authenticated
[   63.628001] wlp2s0: associate with 38:10:d5:7b:bd:05 (try 1/3)
[   63.633091] wlp2s0: RX AssocResp from 38:10:d5:7b:bd:05 (capab=0x1431 status=0 aid=2)
[   63.654196] wlp2s0: associated
[   63.671414] wlp2s0: Limiting TX power to 20 (20 - 0) dBm as advertised by 38:10:d5:7b:bd:05

输出nmcli device

$ nmcli device
DEVICE  TYPE      STATE        CONNECTION     
wlp2s0  wifi      connected    FRITZ!Box 7490 
enp4s0  ethernet  unavailable  --             
lo      loopback  unmanaged    --

输出system-resolve

$ systemd-resolve --status wlp2s0
Link 3 (wlp2s0)
      Current Scopes: DNS
       LLMNR setting: yes
MulticastDNS setting: no
      DNSSEC setting: no
    DNSSEC supported: no
         DNS Servers: 192.168.178.1
          DNS Domain: ~.
                      fritz.box

/etc/resolv.conf

$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.

nameserver 127.0.0.53
search fritz.box
options edns0

输出/run/systemd/resolve/resolv.conf

$ cat /run/systemd/resolve/resolv.conf
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients directly to
# all known uplink DNS servers. This file lists all configured search domains.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 192.168.178.1
search fritz.box

无线适配器

$ sudo lshw -class network
  *-network                 
       description: Wireless interface
       product: Centrino Wireless-N 2230
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlp2s0
       version: c4
       serial: 84:a6:c8:a3:00:02
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-46-generic firmware=18.168.6.1 ip=192.168.178.29 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:27 memory:f7a00000-f7a01fff

我的 Ubuntu 发行版

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.2 LTS
Release:    18.04
Codename:   bionic

答案1

我的 Arch 系统也遇到过类似的问题。每次启动后，初始连接都需要很长时间，随机断开连接等。我解决问题的唯一办法就是更改路由器的频道。我猜想，当您周围有许多无线网络在与您的路由器相同的频道上广播时，就会产生干扰。您可以使用 LinSSID 之类的工具扫描所有附近的网络，然后选择其他路由器较少使用（或不使用）的频道。

sudo apt install linssid

它是一个 GUI 工具，因此使用它应该相当容易。

答案1

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