How to Install Realtek Rtl8852AU Driver on Ubuntu 20.04 – Step-by-step

Installing Driver

3. 3. Downloading Realtek rtl8852AU Driver

   Download Realtek rtl8852AU Driver for Ubuntu GNU/Linux

   Get Realtek rtl8852AU Driver for Ubuntu

   Realtek Driver Source Code for Ubuntu

   Clone it with Git like:

   git clone https://github.com/lwfinger/rtl8852au.git

4. 4. Installing Realtek rtl8852AU Driver

   Then to Install Realtek rtl8852AU Wi-fi Driver for Linux
   Access the Target Folder:

   cd rtl8852au

   And then to Make it play:

   make

   (This Setup has been sucessfully tested with a GCC 12 Compiler on a 6.0 Kernel.)
   Now you can take a long Break cause this setup will require several Minutes to be achieved.
   Then to Setup it run:

   sudo make install

   Especially relevant: you’ll need to renew this Setup after each Kernel Upgrade. Else for a DKMS auto rebuilding installation see directly the Developer’s Docs.
   Last, to load it you may try simply to Reboot:

   sudo reboot

   Or to manually load and unload it:

   sudo modprobe -v 8852au

   sudo modprobe -rv 8852au

   

   Thanks to Lwfinger inestimable Work!

5. 5. Disabling Secure Boot

   (Only on PCs with BIOS and installed in UEFI Mode) So to Disable Secure Boot
   First, check your installation Mode with:

   [ -d /sys/firmware/efi ] && echo "EFI" || echo "BIOS"

   And then again to check Secure Boot state:

   mokutil --sb-state

   If it is Enabled then access you PC BIOS and Disable it!
   In case you may be interested to see: How to Access BIOS Guide.

Congratulations, your Realtek rtl8852AU Network Device on Ubuntu 20.04 should be now nicely working!