After updating to windows 8.1, my lenovo y510p can't have its brightness changed. I can press FN+volume and the slider is adjustable so there's nothing wrong with my audio, but the brightness can't be changed anywhere…
I've tried installing the old Intel windows 8 driver but nothing worked.
How do i solve this issue? My battery dies a lot faster than i would like now, and i do not like working with full brightness All the time.