How to install Tuxedo Keyboard driver(for RGB lid models!) on Debian 11 Bullseye
Log in as root
apt-get update && apt-get upgrade
apt-get install install git
git clone https://github.com/tuxedocomputers/tuxedo-keyboard.git
cd tuxedo-keyboard
git checkout release
Build the keyboard module as a kernel module:
make clean
sudo make dkmsinstall
Load the Module with modprobe:
sudo modprobe tuxedo_keyboard
Source: https://wiki.debian.org/InstallingDebianOn/TUXEDO/NOTEBOOKS/InfinityBookS14v5
The instructions given on the link above where for Debian 10 stable, but they also work on Debian 11 Bullseye