Wifi problems with Ubuntu 20.04 Focal Fossa

Here's a solution I found on another forum. Looks like it has worked for some others quite well. I have not tried it myself since I don't have the same issue.

Change directory:

cd /lib/firmware

Make Directory rtw88

sudo mkdir rtw88

Copy rtl8822befw.bin to the directory you just created:

sudo cp /lib/firmware/rtlwifi/rtl8822befw.bin /lib/firmware/rtw88/

Rename that file to rtw8822b_fw.bin:

sudo mv /lib/firmware/rtw88/rtl8822befw.bin /lib/firmware/rtw88/rtw8822b_fw.bin

reboot your system

It seems to be a kernel problem. When booting you can select Ubuntu Advanced Options from the GRUB menu and select the kernel which works for you (i choose generic kernel).

You can download and install the generic kernel form the UBUNTU kernels which i downloaded generic kernel following the steps provided in the link (https://www.tecmint.com/upgrade-kernel-in-ubuntu/) solved the problem.

Note: I have installed generic kernel version V5.4.81 from https://kernel.ubuntu.com/~kernel-ppa/mainline/ seemed to work fine for me or you can choose the kernel you like.

I've been having this problem of the network dropping, with a "?" in the network icon, in the top right corner.

The following worked for me, without having to reboot the PC.

sudo nmcli networking off

and then,

sudo nmcli networking on