1. Check the network card model

For dual systems, the specific model of the wireless network card can be found in the Control Panel - Device Manager under Windows.

2. Determine the kernel version you need to upgrade

Find the wireless network card driver for Linux on Intel's official website. The driver has requirements for the version of the Linux kernel: link 1 .

Third, upgrade the kernel

1. Download the file

To view your current kernel version, enter the terminal:

name -sr

Open link 2 , select the appropriate version to download (mine is the 5.3 version of the kernel), terminal input: (copy and paste the corresponding link of the download file of link 2)

wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3.5/linux-headers-5.3.5-050305_5.3.5-050305.201910071830_all.deb 
wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3.5/linux-headers-5.3.5-050305-generic_5.3.5-050305.201910071830_amd64.deb
wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3.5/linux-image-unsigned-5.3.5-050305-generic_5.3.5-050305.201910071830_amd64.deb
wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3.5/linux-modules-5.3.5-050305-generic_5.3.5-050305.201910071830_amd64.deb

2. Installation

Method 1: Terminal input:

sudo dpkg -i *.deb

Method 2: Terminal input:

sudo dpkg -i (找到下载的四个文件分别拖入，执行四次)

3. Reboot

Terminal input:

uname -sr

4. Summary of problems and solutions:

1. When upgrading the new kernel of ubuntu 16.04, there is a problem of relying on libssl1.1.0

正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
您可能需要运行“apt-get -f install”来纠正下列错误：
下列软件包有未满足的依赖关系：
 linux-headers-5.3.0-050300rc4-generic : 依赖: libssl1.1 (>= 1.1.0) 但无法安装它......

Solution : link 3

2. After restarting, the following error occurs:

error: /XXX has invalid signature
error: you need to load the kernel first

SOLVED : Link 4

Ubuntu 16.04 upgrades the new kernel (pro-test)