我使用 Ubuntu 18.04，我的无线连接不再工作，而以前它可以工作。我尝试使用不同的路由器，但都发生了相同的情况。“连接失败激活网络连接失败”的消息不断弹出，因此它似乎继续尝试连接但失败了。它读取了很多相对相同的问题，但没有找到解决方案。我禁用了代理，什么也没发生。我不使用 VPN。我想到的终端输出并没有帮助我找到要修复的内容。以下是一些可能有助于您指出问题的输出：
===== sudo lshw -C network =====
*-network
description: Wireless interface
product: Wireless 8260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 3a
serial: 74:70:fd:3d:d9:a2
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-36-generic firmware=34.0.1 ip=192.168.1.55 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:130 memory:e1100000-e1101fff
*-network
description: Ethernet interface
product: Ethernet Connection I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: enp0s31f6
version: 21
serial: 10:62:e5:a2:0c:84
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=3.2.6-k firmware=0.13-4 latency=0 link=no multicast=yes port=twisted pair
resources: irq:131 memory:e1200000-e121ffff
*-network
description: Ethernet interface
physical id: 2
logical name: enp0s20f0u3c2
serial: f6:34:83:93:42:13
capabilities: ethernet physical
configuration: broadcast=yes driver=cdc_ether driverversion=22-Aug-2005 firmware=CDC Ethernet Device link=yes multicast=yes
===== ifconfig =====
enp0s20f0u3c2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::f434:83ff:fe93:4213 prefixlen 64 scopeid 0x20<link>
ether f6:34:83:93:42:13 txqueuelen 1000 (Ethernet)
RX packets 118 bytes 6208 (6.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1682 bytes 299537 (299.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s31f6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 10:62:e5:a2:0c:84 txqueuelen 1000 (Ethernet)
RX packets 190 bytes 33006 (33.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 174 bytes 18215 (18.2 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xe1200000-e1220000
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 124 bytes 8342 (8.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 124 bytes 8342 (8.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.43.84 netmask 255.255.255.0 broadcast 192.168.43.255
inet6 fe80::b322:a09f:1c2:72ab prefixlen 64 scopeid 0x20<link>
ether 74:70:fd:3d:d9:a2 txqueuelen 1000 (Ethernet)
RX packets 6298 bytes 1489707 (1.4 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 17013 bytes 2103759 (2.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo no wireless extensions.
enp0s31f6 no wireless extensions.
wlp2s0 IEEE 802.11 ESSID:"Blank"
Mode:Managed Frequency:2.437 GHz Access Point: 58:48:22:64:35:49
Bit Rate=72.2 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=70/70 Signal level=-27 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:55 Missed beacon:0
enp0s20f0u3c2 no wireless extensions.
===== iwconfig =====
lo no wireless extensions.
enp0s31f6 no wireless extensions.
wlp2s0 IEEE 802.11 ESSID:"Blank"
Mode:Managed Frequency:2.437 GHz Access Point: 58:48:22:64:35:49
Bit Rate=72.2 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=70/70 Signal level=-27 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:55 Missed beacon:0
enp0s20f0u3c2 no wireless extensions.
===== route -n =====
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.43.1 0.0.0.0 UG 20600 0 0 wlp2s0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlp2s0
192.168.43.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
===== ping -c 1 google.com =====
ping: google.com: Name or service not known
chili555 询问的附加信息：
===== dmesg | grep -e iwl -e wlp =====
[ 6.707092] iwlwifi 0000:02:00.0: loaded firmware version 34.0.1 op_mode iwlmvm
[ 6.742687] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
[ 6.816083] iwlwifi 0000:02:00.0: base HW address: 74:70:fd:3d:d9:a2
[ 6.908315] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 6.910713] iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0
[ 8.186022] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 8.433188] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 8.515954] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 1212.494331] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 1212.739471] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 1212.795360] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 1335.585811] wlp2s0: authenticate with 2c:39:96:2c:56:9a
[ 1335.594483] wlp2s0: send auth to 2c:39:96:2c:56:9a (try 1/3)
[ 1335.603386] wlp2s0: authenticated
[ 1335.610266] wlp2s0: associate with 2c:39:96:2c:56:9a (try 1/3)
[ 1335.715959] wlp2s0: associate with 2c:39:96:2c:56:9a (try 2/3)
[ 1335.827947] wlp2s0: associate with 2c:39:96:2c:56:9a (try 3/3)
[ 1335.963648] wlp2s0: association with 2c:39:96:2c:56:9a timed out
[ 1336.136132] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 1336.143910] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 1336.152794] wlp2s0: authenticated
[ 1336.155746] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 1336.157595] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 1336.159613] wlp2s0: associated
[ 1336.191894] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 1336.215449] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[ 1610.067601] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1611.214291] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 1611.404232] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 1611.411889] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 1611.414318] wlp2s0: authenticated
[ 1611.415594] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 1611.417509] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 1611.419256] wlp2s0: associated
[ 1611.428620] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 1611.462507] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[ 1773.795761] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1776.152754] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 1776.154607] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 1776.156788] wlp2s0: authenticated
[ 1776.159585] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 1776.161538] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 1776.163265] wlp2s0: associated
[ 1776.221740] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[ 2212.257284] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 2216.990395] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 2217.055192] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 2220.548245] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 2220.556051] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 2220.562718] wlp2s0: authenticated
[ 2220.563596] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 2220.565439] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 2220.567307] wlp2s0: associated
[ 2220.589263] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 2220.630750] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[ 2340.811403] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 2341.477299] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 2343.753361] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 2343.761009] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 2343.764835] wlp2s0: authenticated
[ 2343.767904] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 2343.769826] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 2343.772549] wlp2s0: associated
[ 2343.780737] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 2343.816017] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[ 2376.382473] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 2379.661515] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 2379.669293] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 2379.675472] wlp2s0: authenticated
[ 2379.679588] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 2379.681479] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 2379.683267] wlp2s0: associated
[ 2379.759563] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[ 5446.233493] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 5446.359163] wlp2s0: authenticate with 58:48:22:64:35:49
[ 5446.366508] wlp2s0: send auth to 58:48:22:64:35:49 (try 1/3)
[ 5446.382687] wlp2s0: authenticated
[ 5446.383702] wlp2s0: associate with 58:48:22:64:35:49 (try 1/3)
[ 5446.389240] wlp2s0: RX AssocResp from 58:48:22:64:35:49 (capab=0x411 status=0 aid=1)
[ 5446.394334] wlp2s0: associated
[ 8655.798445] wlp2s0: deauthenticated from 58:48:22:64:35:49 (Reason: 3=DEAUTH_LEAVING)
[ 8671.027105] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 8671.474290] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[ 8671.483123] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[ 8671.485389] wlp2s0: authenticated
[ 8671.487707] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[ 8671.489557] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=6)
[ 8671.491333] wlp2s0: associated
[ 8671.510804] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 8671.529698] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[16328.425982] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[19875.406133] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[19875.475403] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[19878.960565] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[19878.969077] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[19878.975249] wlp2s0: authenticated
[19878.979956] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[19878.982137] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=5)
[19878.985430] wlp2s0: associated
[19879.000637] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[19879.051291] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[22316.866816] wlp2s0: deauthenticating from 2c:39:96:2c:56:9b by local choice (Reason: 3=DEAUTH_LEAVING)
[22321.244325] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[22321.489274] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[22321.578514] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[22325.081814] wlp2s0: authenticate with 2c:39:96:2c:56:9b
[22325.089608] wlp2s0: send auth to 2c:39:96:2c:56:9b (try 1/3)
[22325.095648] wlp2s0: authenticated
[22325.099195] wlp2s0: associate with 2c:39:96:2c:56:9b (try 1/3)
[22325.101075] wlp2s0: RX AssocResp from 2c:39:96:2c:56:9b (capab=0x411 status=0 aid=3)
[22325.103524] wlp2s0: associated
[22325.104472] wlp2s0: Limiting TX power to 23 (23 - 0) dBm as advertised by 2c:39:96:2c:56:9b
[22325.118334] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[22453.191928] wlp2s0: disconnect from AP 2c:39:96:2c:56:9b for new auth to 2c:39:96:2c:56:9a
[22453.202593] wlp2s0: authenticate with 2c:39:96:2c:56:9a
[22453.209501] wlp2s0: send auth to 2c:39:96:2c:56:9a (try 1/3)
[22453.219291] wlp2s0: authenticated
[22453.231579] wlp2s0: associate with 2c:39:96:2c:56:9a (try 1/3)
[22453.236579] wlp2s0: RX ReassocResp from 2c:39:96:2c:56:9a (capab=0x31 status=0 aid=2)
[22453.254559] wlp2s0: associated
===== nmcli dev wifi list =====
IN-USE SSID MODE CHAN RATE SIGNAL BARS SECURITY
Livebox-2E10 Infra 112 540 Mbit/s 74 ▂▄▆_ WPA2
Orange_Swiatlowod_E0F0_5GHz Infra 52 540 Mbit/s 70 ▂▄▆_ WPA1 WPA2
SCG200_LBO Infra 100 270 Mbit/s 67 ▂▄▆_ WPA2
SCG200_Tunnel Infra 100 270 Mbit/s 67 ▂▄▆_ WPA2
* Audio3D Infra 6 130 Mbit/s 66 ▂▄▆_ WPA1 WPA2
Livebox-5DC6 Infra 11 195 Mbit/s 62 ▂▄▆_ WPA2
Livebox-85e4 Infra 1 130 Mbit/s 59 ▂▄▆_ WPA1 WPA2
Livebox-A9A4 Infra 6 130 Mbit/s 59 ▂▄▆_ WPA1 WPA2
Orange_Swiatlowod_E0F0 Infra 1 130 Mbit/s 57 ▂▄▆_ WPA1 WPA2
Livebox-828C Infra 6 130 Mbit/s 57 ▂▄▆_ WPA1 WPA2
Livebox-848c Infra 11 130 Mbit/s 57 ▂▄▆_ WPA1
如果需要的话我会发布其他输出。
非常感谢您抽出时间。
答案1
我们清楚地看到您的无线漫游在三个接入点之间寻找更好的连接。这解释了恼人的断线和重新连接。
wlp2s0：使用 2c:39:96:2c:56:9a 进行身份验证
wlp2s0：使用 2c:39:96:2c:56:9b 进行身份验证
wlp2s0：使用 58:48:22:64:35:49 进行身份验证
我怀疑前两个是设置为自动选择频率和频道的同一路由器的 2.4 GHz 段和 5 GHz 段。如果您对此路由器有管理权限，我建议您重命名这些段；例如 peehay2.4 和 peehay5。每个段使用固定频道并使用 WPA2-AES（有时称为 CCMP）。我不建议使用任何混合模式，尤其是 TKIP。
您也可以通过 MAC 地址将无线网络绑定到最佳接入点，如下所示：Ubuntu 连接断开。工作了一段时间后又开始断开