RealTek drivers not working with Ubuntu 20.04 kernel: 5.4
Solution 1:
I have Lenovo Ideapad 530S, after upgrading to Ubuntu 20.04 from 18.04 WI-FI stopped working.
This post helped me: https://askubuntu.com/a/1271087/972111
sudo apt install build-essential git
git clone https://github.com/mid-kid/r8822be.git
cd r8822be
./make
# remove the misbehaving rtw88 module
sudo rmmod rtwpci rtw88
# install the r8822be module
sudo ./make install
sudo modprobe r8822be
sudo reboot