GNU/Linux Debian Bookworm Realtek rtl8814BU Wi-fi Driver Setup Guide
The linked Tutorial Shows You Step-by-Step How to Install Realtek rtl8814BU Wireless Driver in Debian Bookworm 12.x GNU/Linux.
Especially relevant, I propose here the most likely Solution to Setup Realtek rtl8814BU Chipset Driver on Debian 12.
Explanation: “AU” and “BU” in Realtek chipsets generally refer to:
- A or B = chipset variant (often very similar)
- U = USB interface
Currently the best mantained Out-of-Kernel Realtek rtl8814BU Linux Drivers are: Lwfinger and Morrownr.

GNU/Linux Debian Realtek rtl8814BU Driver Installation Guide