[LINUX] Enable the Ideapad S540 (14 ryzen) built-in wireless LAN (RTL8822BE) with CentOS8

For the time being, I can now remove the USB wireless adapter.

◆ Reference

https://forums.ubuntulinux.jp/viewtopic.php?id=19826 https://askubuntu.com/questions/1082335/bluetooth-and-wifi-not-working-on-ubuntu-14-04-rtl8822be-pcie/1082938

◆ Background

[hoge@localhost ~]$ lspci -nn
~abridgement~
01:00.0 SD Host controller [0805]: O2 Micro, Inc. SD/MMC Card Reader Controller [1217:8621](rev 01)
##↓ I want to use this
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter [10ec:b822]
03:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981 [144d:a808]
~~abridgement

◆ Package installation

sudo yum install git
sudo yum install elfutils-libelf-devel

◆ Driver installation

git clone https://github.com/lwfinger/rtlwifi_new.git
cd cd rtlwifi_new
git checkout -b extended origin/extended
make
sudo make install
sudo modprobe rtl8822be
sudo shutdown -r now
PC restart

◆ Firmware installation

wget https://github.com/wkennington/linux-firmware/raw/master/rtlwifi/rtl8822befw.bin
sudo cp rtl8822befw.bin /lib/firmware/rtlwifi/
sudo shutdown -r now
PC restart