这个答案最靠谱：https://ask.fedoraproject.org/en/question/69953/wifi-not-showing-after-update/
WIFI not showing after update
I'm using lenovo G510 Laptop with Fedora 22 I have update the fedora recently now my WiFi is not showing. Please kind enough to help me.
lspci -nn | grep Network :- 02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
rpm -qa | grep broadcom :- broadcom-wl-6.30.223.248-2.fc22.noarch
package rpmfusion-free-release-22-1.noarch (which is newer than rpmfusion-free-release-20-1.noarch) is already installed package rpmfusion-nonfree-release-22-1.noarch (which is newer than rpmfusion-nonfree-release-20-1.noarch) is already installed
yum install kmod-wl :- Package kmod-wl-6.30.223.248-8.fc22.1.x86_64 is already installed
yum install ndiswrapper :- Package ndiswrapper-1.59-1.fc22.x86_64 is already installed
yum install broadcom-wl :- Package broadcom-wl-6.30.223.248-2.fc22.noarch is already installed
uname -r :- 4.0.4-303.fc22.x86_64
rpm -q kmod-wl :- kmod-wl-6.30.223.248-8.fc22.1.x86_64
步骤：
1. dnf install akmod-wl kernel-devel kernel
2. akmods --force --kernels 4.0.4-303.fc22.x86_64 （这里的版本信息用 uname -a 查看一下）
3. reboot
Fedora下BCM4313无线网卡驱动加载：http://www.linuxdiyf.com/linux/6038.html
Fedora 15中BCM4312无线网卡的安装：http://www.linuxdiyf.com/linux/6170.html
Fedora 16无线网卡故障解决：http://www.linuxdiyf.com/linux/3924.html
Fedora 16下编译安装无线网卡驱动：http://www.linuxdiyf.com/linux/4499.html
在Fedora 7下安装USB无线网卡TL-WN321G：http://www.linuxdiyf.com/linux/4969.html