我运行的是 22.04，无法连接 WiFi 网络。每次出现的问题都不一样，但现在网络管理器显示已连接，但我无法 ping 通服务器。我的 WiFi 质量很差，但这不是问题所在，因为在 Android 和 Ubuntu 上连接实时 USB 都没问题。
我甚至尝试过重新安装网络管理器以防它出错（安装了网络管理器 snap，删除了网络管理器 apt，重新启动），但还是发生了同样的事情。一定是系统深处的某些配置很久以前就被更改了（所以 Timeshift 快照无法解决这个问题）。
输出sudo journalctl -b 0 -u NetworkManager：
https://gitgd.com/?7befadff417fe05f#BnePJHPsm7X845XagHL7jKqkad41ovo4LiiZdn6g9PJh
sudo journalctl -b 0 -u NetworkManager:
Aug 03 09:39:46 asus systemd[1]: Starting Network Manager...
Aug 03 09:39:46 asus NetworkManager[683]: <info> [1691048386.4102] NetworkManager (version 1.36.6) is starting... (for the first time)
Aug 03 09:39:46 asus NetworkManager[683]: <info> [1691048386.4105] Read config: /etc/NetworkManager/NetworkManager.conf (lib: 10-dns-resolved.conf, 20-connectivity-ubuntu.conf, no-mac-addr-change.con>
Aug 03 09:39:46 asus NetworkManager[683]: <info> [1691048386.4152] bus-manager: acquired D-Bus service "org.freedesktop.NetworkManager"
Aug 03 09:39:46 asus NetworkManager[683]: <info> [1691048386.4309] manager[0x55e014f23040]: monitoring kernel firmware directory '/lib/firmware'.
Aug 03 09:39:46 asus NetworkManager[683]: <info> [1691048386.4313] monitoring ifupdown state file '/run/network/ifstate'.
Aug 03 09:39:46 asus systemd[1]: Started Network Manager.
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1134] hostname: hostname: using hostnamed
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1134] hostname: static hostname changed from (none) to "asus"
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1196] dns-mgr[0x55e014f012a0]: init: dns=systemd-resolved rc-manager=unmanaged (auto), plugin=systemd-resolved
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1219] rfkill3: found Wi-Fi radio killswitch (at /sys/devices/pci0000:00/0000:00:1d.0/0000:01:00.0/ieee80211/phy0/rfkill3) (driver ath10k_p>
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1223] rfkill0: found Wi-Fi radio killswitch (at /sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/rfkill/rfkill0) (platform drive>
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1261] manager[0x55e014f23040]: rfkill: Wi-Fi hardware radio set enabled
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1261] manager[0x55e014f23040]: rfkill: WWAN hardware radio set enabled
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1422] Loaded device plugin: NMWwanFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-wwan.so)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1457] Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-bluetooth.so)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1465] Loaded device plugin: NMAtmManager (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-adsl.so)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1509] Loaded device plugin: NMTeamFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-team.so)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1729] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-wifi.so)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1740] manager: rfkill: Wi-Fi disabled by radio killswitch; enabled by state file
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1745] manager: rfkill: WWAN enabled by radio killswitch; enabled by state file
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1758] manager: Networking is enabled by state file
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1808] settings: Loaded settings plugin: ifupdown ("/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-settings-plugin-ifupdown.so")
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1809] settings: Loaded settings plugin: keyfile (internal)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1809] ifupdown: management mode: unmanaged
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.1811] ifupdown: interfaces file /etc/network/interfaces doesn't exist
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.3941] dhcp-init: Using DHCP client 'internal'
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.3944] device (lo): carrier: link connected
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4034] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4147] device (wlp1s0): driver supports Access Point (AP) mode
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4170] manager: (wlp1s0): new 802.11 Wi-Fi device (/org/freedesktop/NetworkManager/Devices/2)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4192] device (wlp1s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4208] device (wlp1s0): set-hw-addr: set MAC address to 38:FA:BE:1U:R2:8C (scanning)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4352] manager: (ipv6leakintrf0): new Dummy device (/org/freedesktop/NetworkManager/Devices/3)
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4782] device (ipv6leakintrf0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.4920] failed to open /run/network/ifstate
Aug 03 09:39:48 asus NetworkManager[683]: <info> [1691048388.5190] manager: rfkill: Wi-Fi now enabled by radio killswitch
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0724] modem-manager: ModemManager available
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0767] device (ipv6leakintrf0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0794] policy: auto-activating connection 'pvpn-ipv6leak-protection' (d691cbb6-6d2b-4b10-b316-8c3d72b798cc)
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0802] device (ipv6leakintrf0): Activation: starting connection 'pvpn-ipv6leak-protection' (d691cbb6-6d2b-4b10-b316-8c3d72b798cc)
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0804] device (ipv6leakintrf0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0830] manager: NetworkManager state is now CONNECTING
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0842] device (ipv6leakintrf0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0853] device (ipv6leakintrf0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.0933] device (ipv6leakintrf0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1119] device (ipv6leakintrf0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1124] device (ipv6leakintrf0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1130] manager: NetworkManager state is now CONNECTED_LOCAL
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1138] manager: NetworkManager state is now CONNECTED_SITE
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1155] policy: set 'pvpn-ipv6leak-protection' (ipv6leakintrf0) as default for IPv6 routing and DNS
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1169] device (ipv6leakintrf0): Activation: successful, device activated.
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.1248] manager: NetworkManager state is now CONNECTED_GLOBAL
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.2115] device (wlp1s0): supplicant interface state: internal-starting -> disconnected
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.2116] Wi-Fi P2P device controlled by interface wlp1s0 created
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.2121] manager: (p2p-dev-wlp1s0): new 802.11 Wi-Fi P2P device (/org/freedesktop/NetworkManager/Devices/4)
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.2133] device (p2p-dev-wlp1s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.2233] device (wlp1s0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Aug 03 09:39:49 asus NetworkManager[683]: <info> [1691048389.2279] device (p2p-dev-wlp1s0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:53 asus NetworkManager[683]: <info> [1691048393.8448] agent-manager: agent[6a942d5ff70128bb,:1.33/org.gnome.Shell.NetworkAgent/127]: agent registered
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.1890] policy: auto-activating connection 'essid' (sd64fcviud6v8gd6rgb2hn)
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.1940] device (wlp1s0): Activation: starting connection 'essid' (sd64fcviud6v8gd6rgb2hn)
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.1944] device (wlp1s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2097] device (wlp1s0): set-hw-addr: set-cloned MAC address to BE:BF:16:3E:45:23 (random)
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2140] device (wlp1s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2145] device (wlp1s0): Activation: (wifi) access point 'essid' has security, but secrets are required.
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2145] device (wlp1s0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2174] device (wlp1s0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2199] device (wlp1s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2225] device (wlp1s0): Activation: (wifi) connection 'essid' has security, and secrets exist. No new secrets needed.
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2227] Config: added 'ssid' value 'essid'
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2230] Config: added 'scan_ssid' value '1'
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2232] Config: added 'bgscan' value 'simple:30:-70:86400'
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2233] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256 FT-PSK SAE FT-SAE'
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2235] Config: added 'psk' value '<hidden>'
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2313] device (wlp1s0): supplicant interface state: disconnected -> interface_disabled
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2314] device (p2p-dev-wlp1s0): supplicant management interface state: disconnected -> interface_disabled
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2394] device (wlp1s0): supplicant interface state: interface_disabled -> inactive
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2394] device (p2p-dev-wlp1s0): supplicant management interface state: interface_disabled -> inactive
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2938] device (wlp1s0): supplicant interface state: inactive -> authenticating
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2939] device (p2p-dev-wlp1s0): supplicant management interface state: inactive -> authenticating
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2959] device (wlp1s0): supplicant interface state: authenticating -> associating
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.2959] device (p2p-dev-wlp1s0): supplicant management interface state: authenticating -> associating
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.3195] device (wlp1s0): supplicant interface state: associating -> associated
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.3195] device (p2p-dev-wlp1s0): supplicant management interface state: associating -> associated
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.6082] device (wlp1s0): supplicant interface state: associated -> completed
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.6082] device (wlp1s0): Activation: (wifi) Stage 2 of 5 (Device Configure) successful. Connected to wireless network "essid"
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.6082] device (p2p-dev-wlp1s0): supplicant management interface state: associated -> completed
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.6086] device (wlp1s0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:54 asus NetworkManager[683]: <info> [1691048394.6101] dhcp4 (wlp1s0): activation: beginning transaction (timeout in 45 seconds)
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3442] dhcp4 (wlp1s0): state changed new lease, address=192.168.1.135
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3474] device (wlp1s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3544] device (wlp1s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3548] device (wlp1s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3601] policy: set 'essid' (wlp1s0) as default for IPv4 routing and DNS
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3610] device (wlp1s0): Activation: successful, device activated.
Aug 03 09:39:56 asus NetworkManager[683]: <info> [1691048396.3649] manager: startup complete
Aug 03 09:40:17 asus NetworkManager[683]: <info> [1691048417.8750] agent-manager: agent[8cee45d5d03c1900,:1.73/org.gnome.Shell.NetworkAgent/1000]: agent registered
答案1
确保如果您正在运行网络管理器，请禁用网络服务：
- 查找与 /etc/network/interfaces 相关的所有内容
- 删除有wifi卡的线路
重启机器