Sony Vaio Backlight

I’m using Ubuntu in a Sony Vaio SVF15A17CLB, which has a backlighted keyboard, but it’s not turned on by the System by default, so, every time I want to turn it on I have to manually change the value in:
from -1 to 1 with sudo vi

But that resets every time I restart the computer.

Is it a setting somewhere else handling that? Can I make it permanent?

@macmauricio, this isn’t a support site.

Please refer to the page for help with your issue.

I’ve moved this to the category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the page.