我必须在 MacBook Air 2014 上运行 Ubuntu 14.04。几年前安装操作系统后，我记得必须使用以太网连接手动安装 wifi 驱动程序。从那时起，Wifi 一直运行良好，直到今天。
在系统更新程序提示进行常规内核更新并随后重新启动后，我的 WiFi 突然停止工作。
当我在命令行中输入“wifi on”时，我现在得到：
wifi = none (no device)
现在命令“sudo modprobe wl”给我：
modprobe: FATAL: Module wl not found.
阅读其他帖子后，我尝试重新安装 bcmwl-kernel-source 包，但无济于事。
作为参考，sudo lspci -v 输出的相关部分是：
03:00.0 Network controller: Broadcom Corporation BCM4360 802.11ac Wireless Network Adapter (rev 03)
Subsystem: Apple Inc. Device 0117
Flags: bus master, fast devsel, latency 0
Memory at b0600000 (64-bit, non-prefetchable) [size=32K]
Memory at b0400000 (64-bit, non-prefetchable) [size=2M]
Capabilities: [48] Power Management version 3
Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [68] Vendor Specific Information: Len=44 <?>
Capabilities: [ac] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Device Serial Number 8c-29-00-ff-ff-00-00-01
Capabilities: [150] Power Budgeting <?>
Capabilities: [160] Virtual Channel
Capabilities: [1b0] Latency Tolerance Reporting
Capabilities: [220] #15
感谢您的帮助
编辑：
“sudo dpkg -s bcmwl-kernel-source”给出：
Package: bcmwl-kernel-source
Status: install ok installed
Priority: optional
Section: admin
Installed-Size: 7902
Maintainer: Ubuntu Developers <[email protected]>
Architecture: amd64
Source: bcmwl
Version: 6.30.223.271+bdcom-0ubuntu1~0.1
Replaces: bcmwl-modaliases
Depends: dkms, linux-libc-dev, libc6-dev
Conflicts: bcmwl-modaliases
Description: Broadcom 802.11 Linux STA wireless driver source
This package contains Broadcom 802.11 Linux STA wireless driver
for use with Broadcom's BCM4311-, BCM4312-, BCM4313-, BCM4321-,
BCM4322-, BCM43224-, and BCM43225-, BCM43227- and BCM43228-based
hardware.
Modaliases: wl(pci:v000014E4d00004311sv*sd*bc02sc80i*, pci:v000014E4d00004312sv*sd*bc02sc80i*, pci:v000014E4d00004313sv*sd*bc02sc80i*, pci:v000014E4d00004315sv*sd*bc02sc80i*, pci:v000014E4d00004727sv*sd*bc02sc80i*, pci:v000014E4d00004328sv*sd*bc02sc80i*, pci:v000014E4d00004328sv*sd*bc02sc80i*, pci:v000014E4d00004329sv*sd*bc02sc80i*, pci:v000014E4d0000432asv*sd*bc02sc80i*, pci:v000014E4d0000432bsv*sd*bc02sc80i*, pci:v000014E4d0000432csv*sd*bc02sc80i*, pci:v000014E4d0000432dsv*sd*bc02sc80i*, pci:v000014E4d00004365sv*sd*bc02sc80i*, pci:v000014E4d00004353sv*sd*bc02sc80i*, pci:v000014E4d00004357sv*sd*bc02sc80i*, pci:v000014E4d00004358sv*sd*bc02sc80i*, pci:v000014E4d00004359sv*sd*bc02sc80i*, pci:v000014E4d00004331sv*sd*bc02sc80i*, pci:v000014E4d000043a0sv*sd*bc02sc80i*, pci:v000014E4d000043B1sv*sd*bc02sc80i*)
Original-Maintainer: Alberto Milone <[email protected]>
“sudo updatedb && located wl.ko” 没有输出。
第二次编辑：
sebastien:~$ sudo apt-get install --reinstall bcmwl-kernel-source
[sudo] password for sebastien:
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 4 not upgraded.
Need to get 1,545 kB of archives.
After this operation, 0 B of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
bcmwl-kernel-source
Install these packages without verification? [y/N] y
Get:1 http://us.archive.ubuntu.com/ubuntu/ trusty-proposed/restricted bcmwl-kernel-source amd64 6.30.223.271+bdcom-0ubuntu1~0.1 [1,545 kB]
Fetched 1,545 kB in 1s (1,010 kB/s)
(Reading database ... 297568 files and directories currently installed.)
Preparing to unpack .../bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu1~0.1_amd64.deb ...
Removing all DKMS Modules
Done.
Unpacking bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~0.1) over (6.30.223.271+bdcom-0ubuntu1~0.1) ...
Setting up bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~0.1) ...
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
Building only for 3.13.0-164-generic
Building for architecture x86_64
Module build for the currently running kernel was skipped since the
kernel source for this kernel does not seem to be installed.
modprobe: FATAL: Module wl not found.
update-initramfs: deferring update (trigger activated)
Processing triggers for shim-signed (1.33.1~14.04.3+13-0ubuntu2) ...
Secure Boot not enabled on this system.
Processing triggers for initramfs-tools (0.103ubuntu4.11) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-164-generic
答案1
经过调查，我们发现驱动程序无法正确编译，因为未安装所需的内核头文件：
由于似乎未安装当前正在运行的内核的内核源，因此跳过了当前正在运行的内核的模块构建。modprobe：FATAL：未找到模块 wl。
我建议你这样做：
sudo apt-get update
sudo apt-get install linux-headers-generic
如果没有错误，那么：
sudo apt-get install --reinstall bcmwl-kernel-source
我很高兴它现在可以工作了。
答案2
升级 ubuntu 14.04 机器后，wlan 不再工作。我在 Launchpad 上找到了一个解决方案（https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1818134)。首先，删除 shim-signed 软件包：
sudo apt remove shim-signed
然后再次安装包 bcmwl-kernel-source（--reinstall 也应该有效）：
sudo apt remove bcmwl-kernel-source
sudo apt install bcmwl-kernel-source