☰

20.04 更新后无法连接 5Ghz wifi

tag-icon • tag-icon networking wireless 20.04
20.04 更新后无法连接 5Ghz wifi

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

相关内容