I've been using my Vaio VPCF121FX for over a year now, running Ubuntu 10.10 and then 11.04 and my backlight keyboard has always worked flawlessly. Until now, I just install Ubuntu 11.10 and this feature seems to be missing or forgotten by the developers.

Truth be told, I'm a late-at-night kinda typer so this is something I do use a lot in my day-to-day (or should I say nigth-to-night) laptop environment.

Does anyone know how to fix it?