My Librem 14 has been crashing when I turn on my keyboard lights. Wild issue, but didn’t realize it was until I needed them.
Could you clarify what you’re experiencing @Muadi? Are you toggling the keyboard backlight using Fn+Space or something else? Does the device shut off, freeze, or restart?
Toggling using the FN key and F4 … It’ll adjust the brightness then after a short while