Backlit keyboard default to on at wake-up

I have an R14 convertible. I would like to have the backlit keyboard on by default and not have to press Fn + F10 every time the computer comes out of sleep or hibernate because it's often too dark in the room to find these keys, which defeats the purpose of having a backlit keyboard. Most computers' keyboards have the backlit on by default including your newer R15. There must be a registry setting for this. It's okay if it goes off after a number of seconds of non-use, and then press any key, but I would like it to be on at wake-up or logon by default. Thanks.