Once in a while, the screen brightness stops responding to any reason, and stays on full brightness.

For those of you that have HP Envy, you know what this means: battery suicide.

The `FN`+\* controls don't work. I also tried going in to power settings and adjusting all modes brightness to low wend of spectrum, after saving, it has no effect.

I suppose I could try rebooting as I always just put my laptop to sleep. 

Anyone came across this?