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KUbuntu 20.04.3 LTS 上缺少 `cfg80211` 内核模块（英特尔 WiFi 卡不工作）

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KUbuntu 20.04.3 LTS 上缺少 `cfg80211` 内核模块（英特尔 WiFi 卡不工作）

编辑：经过进一步调查，我发现我缺少cfg80211所iwlwifi依赖的内核模块：

modinfo cfg80211

filename:       /lib/modules/5.4.0-104-generic/kernel/net/wireless/cfg80211.ko
modinfo: ERROR: could not get modinfo from 'cfg80211': No such file or directory

我该如何纠正这个问题？

原始问题如下：

我正在安装tp-link AC1200 Archer T5E，芯片组是英特尔AC7265。我尝试从他们的网站，将其复制到/lib/firmware/，然后重新启动，但没有成功。根据网站，我使用的内核内置了对它的支持。一些命令输出：

neofetch

OS: KUbuntu 20.04.3 LTS x86_64 
Host: MS-7C02 1.0 
Kernel: 5.4.0-104-generic

lspci -nnk

21:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095a] (rev 59)
        DeviceName: Broadcom 5762
        Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5010]
        Kernel modules: iwlwifi

iwconfig（我有一个 USB 系绳作为创可贴，enp34s0是以太网）

usb0      no wireless extensions.

lo        no wireless extensions.

enp34s0   no wireless extensions.

br-4400933269a8  no wireless extensions.

docker0   no wireless extensions.

rfkill list all（我认为这只是我的键盘的加密狗）

0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no

sudo lshw -C network

  *-network UNCLAIMED       
       description: Network controller
       product: Wireless 7265
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:21:00.0
       version: 59
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list
       configuration: latency=0
       resources: memory:f7600000-f7601fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:22:00.0
       logical name: enp34s0
       version: 15
       serial: 00:d8:61:e0:65:9b
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII
       resources: irq:37 ioport:f000(size=256) memory:f7504000-f7504fff memory:f7500000-f7503fff
  *-network
       description: Ethernet interface
       physical id: 1
       bus info: usb@1:7
       logical name: usb0
       serial: 26:31:73:3a:64:4d
       capabilities: ethernet physical
       configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.117 link=yes multicast=yes

答案1

最终对我有用的是：

sudo apt update
sudo apt dist-upgrade

增加了补丁版本，我现在可以使用Ubuntu 20.04.4 LTS x86_64，并且一切正常！modinfo cfg80211现在按预期显示有关模块的信息。

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