GNU/Linux Realtek rtl8821AU Driver Setup Guide
Hi! The Tutorial shows you Step-by-Step How to Install Realtek rtl8821AU WiFi Driver in GNU+Linux Distributions.
Especially relevant: this Realtek rtl8821AU Driver Linux Setup should be working also after a Kernel Upgrade with the Dkms integration.
Finally, from the Realtek Support Driver Website comes out that it may be working for all the following Chipsets: