最近更新我的电脑后，系统设置中缺少 wifi 选项。我的 wifi 卡是 Intel Corporation Wireless-AC 9462，我使用的是 ubuntu 20.04
sudo lshw -class network
*-network UNCLAIMED
description: Network controller
product: Wireless-AC 9462
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix cap_list
configuration: latency=0
resources: memory:b1218000-b121bfff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 10
serial: 00:2b:67:95:91:8c
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd 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=rtl8168g-3_0.0.1 04/23/13 latency=0 link=no multicast=yes port=MII
resources: irq:16 ioport:2000(size=256) memory:b1104000-b1104fff memory:b1100000-b1103fff
*-network
description: Ethernet interface
physical id: 2
logical name: bnep0
serial: a8:7e:ea:21:71:c1
capabilities: ethernet physical
configuration: broadcast=yes ip=192.168.44.141 multicast=yes
我的 Linux 内核版本是
5.4.0-48-generic
输出dpkg -l | grep linux是
dpkg -l | grep linux
ii binutils-x86-64-linux-gnu 2.34-6ubuntu1 amd64 GNU binary utilities, for x86-64-linux-gnu target
ii console-setup-linux 1.194ubuntu3 all Linux specific part of console-setup
ii fonts-linuxlibertine 5.3.0-4 all Linux Libertine family of fonts
ii libselinux1:amd64 3.0-1build2 amd64 SELinux runtime shared libraries
ii libselinux1-dev:amd64 3.0-1build2 amd64 SELinux development headers
ii libv4l-0:amd64 1.18.0-2build1 amd64 Collection of video4linux support libraries
ii libv4lconvert0:amd64 1.18.0-2build1 amd64 Video4linux frame format conversion library
ii linux-base 4.5ubuntu3.1 all Linux image base package
ii linux-firmware 1.187.3 all Firmware for Linux kernel drivers
ii linux-generic-hwe-20.04 5.4.0.48.51 amd64 Complete Generic Linux kernel and headers
ii linux-headers-5.4.0-47 5.4.0-47.51 all Header files related to Linux kernel version 5.4.0
ii linux-headers-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel headers for version 5.4.0 on 64 bit x86 SMP
ii linux-headers-5.4.0-48 5.4.0-48.52 all Header files related to Linux kernel version 5.4.0
ii linux-headers-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel headers for version 5.4.0 on 64 bit x86 SMP
ii linux-headers-generic-hwe-20.04 5.4.0.48.51 amd64 Generic Linux kernel headers
rc linux-image-5.4.0-26-generic 5.4.0-26.30 amd64 Signed kernel image generic
rc linux-image-5.4.0-42-generic 5.4.0-42.46 amd64 Signed kernel image generic
rc linux-image-5.4.0-45-generic 5.4.0-45.49 amd64 Signed kernel image generic
ii linux-image-5.4.0-47-generic 5.4.0-47.51 amd64 Signed kernel image generic
ii linux-image-5.4.0-48-generic 5.4.0-48.52 amd64 Signed kernel image generic
ii linux-image-generic-hwe-20.04 5.4.0.48.51 amd64 Generic Linux kernel image
ii linux-libc-dev:amd64 5.4.0-48.52 amd64 Linux Kernel Headers for development
rc linux-modules-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-42-generic 5.4.0-42.46 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-45-generic 5.4.0-45.49 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-42-generic 5.4.0-42.46 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-45-generic 5.4.0-45.49 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-extra-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-extra-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-sound-base 1.0.25+dfsg-0ubuntu5 all base package for ALSA and OSS sound systems
ii pptp-linux 1.10.0-1build1 amd64 Point-to-Point Tunneling Protocol (PPTP) Client
ii syslinux 3:6.04~git20190206.bf6db5b4+dfsg1-2 amd64 collection of bootloaders (DOS FAT and NTFS bootloader)
ii syslinux-common 3:6.04~git20190206.bf6db5b4+dfsg1-2 all collection of bootloaders (common)
ii syslinux-legacy 2:3.63+dfsg-2ubuntu9 amd64 Bootloader for Linux/i386 using MS-DOS floppies
ii util-linux 2.34-0.1ubuntu9.1 amd64 miscellaneous system utilities
输出grep iwlwifi /etc/modprobe.d/*为
/etc/modprobe.d/iwlwifi.conf:# /etc/modprobe.d/iwlwifi.conf
/etc/modprobe.d/iwlwifi.conf:# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
/etc/modprobe.d/iwlwifi.conf:# microcode file installed on the system. When removing iwlwifi, first
/etc/modprobe.d/iwlwifi.conf:# remove the iwl?vm module and then iwlwifi.
/etc/modprobe.d/iwlwifi.conf:remove iwlwifi \
/etc/modprobe.d/iwlwifi.conf:(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
输出lspci -knn | grep Net -A3为
00:14.3 Network controller [0280]: Intel Corporation Wireless-AC 9462 [8086:02f0]
Subsystem: Intel Corporation Wireless-AC 9462 [8086:0074]
Kernel modules: wl, iwlwifi
00:16.0 Communication controller [0780]: Intel Corporation Comet Lake Management Engine Interface [8086:02e0]
请帮我解决这个问题。
答案1
通过关闭安全启动并安装 bcmwl-kernel-source，问题已经得到解决，但我不知道为什么。所以有人能解释一下问题是什么以及我的解决方案如何工作吗？这是我在终端中运行的命令
sudo apt-get install --reinstall bcmwl-kernel-source