How to adjust the backlighting on the Razer Cynosa Lite keyboard on Ubuntu 24.04

install openrazer-daemon and python3-openrazer via apt.

Don't bother with installing razercfg and qrazercfg since they did not work, at least not for me. They return:

    from pyrazer import *
ModuleNotFoundError: No module named 'pyrazer'

Instead, install flatpak if not already installed and do:

flatpak install xyz.z3ntu.razergenie

Then make sure your user is in the plugdev group:

sudo gpasswd -a $USER plugdev

Then start razergenie as a normal application.

If it still does not work, try to plug the keyboard into a different USB port.

Verfying that the keyboard is seen. Start a python interpreter:

In [1]: from openrazer import client
In [2]: c = client.DeviceManager()
In [3]: c._dbus_devices.getDevices()

It should return something like:

Out[3]: dbus.Array([dbus.String('astringdescribingthekeyboard')], signature=dbus.Signature('s'))

More troubleshooting info here: