![20.04 更新后无法连接 5Ghz wifi](https://linux22.com/image/1179329/20.04%20%E6%9B%B4%E6%96%B0%E5%90%8E%E6%97%A0%E6%B3%95%E8%BF%9E%E6%8E%A5%205Ghz%20wifi.png)
大约 2 天前,我全新安装了 Ubuntu 20.04,一切运行良好。今天早上,我运行了 apt update 和 apt upgrade 并重新启动,现在我的 wifi 无法连接到我的 5Ghz 网络。它将连接到我的 2.4Ghz 网络。这是在联想 ThinkPad T410 上。
$ nmcli device
DEVICE TYPE STATE CONNECTION
enp0s25 ethernet connected Wired connection 1
wlp3s0 wifi disconnected --
来自 lspci 的信息:
$ lspci -nnk | grep -iA2 net
00:19.0 Ethernet controller [0200]: Intel Corporation 82577LM Gigabit Network Connection [8086:10ea] (rev 06)
Subsystem: Lenovo 82577LM Gigabit Network Connection [17aa:2153]
Kernel driver in use: e1000e
Kernel modules: e1000e
--
03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6200 [8086:4239] (rev 35)
Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN [8086:1311]
Kernel driver in use: iwlwifi
sudo lshw 类网络的结果:
*-network
description: Wireless interface
product: Centrino Advanced-N 6200
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 35
serial: 58:94:6b:d9:ac:cc
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.8.0-36-generic firmware=9.221.4.1 build 25532 6000-4.uc latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:31 memory:f2400000-f2401fff
lspci 的结果:
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)
rfkill 的结果:
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
dmesg 输出:
[ 2287.166207] perf: interrupt took too long (7719 > 7717), lowering kernel.perf_event_max_sample_rate to 25750
[ 3057.673757] wlp3s0: authenticate with d8:07:b6:b0:ac:be
[ 3057.676517] wlp3s0: send auth to d8:07:b6:b0:ac:be (try 1/3)
[ 3057.751437] wlp3s0: authenticated
[ 3057.753283] wlp3s0: associate with d8:07:b6:b0:ac:be (try 1/3)
[ 3057.754414] wlp3s0: RX AssocResp from d8:07:b6:b0:ac:be (capab=0x11 status=0 aid=7)
[ 3057.757489] wlp3s0: associated
[ 3057.853016] wlp3s0: Limiting TX power to 30 (30 - 0) dBm as advertised by d8:07:b6:b0:ac:be
[ 3102.648706] wlp3s0: deauthenticating from d8:07:b6:b0:ac:be by local choice (Reason: 3=DEAUTH_LEAVING)
dmesg | grep -i firmware 的结果:
iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-6000-6.ucode failed with error -2
当我尝试连接到 5Ghz 时,需要很长时间,然后出现错误消息:激活网络连接失败。
有什么建议么?
答案1
我修好了。我进入路由器的 wifi 设置,将安全性改为 wpa2/wpa3-personal