Hello,
I'm not sure this is a hardware problem:
my screen is supposed to switch off automatically after 30 seconds of idleness, but it only dims down halfway. When I touch it or pull the slider in that condition, it brightens up.
To acutally switch it off, I need to do it manually w/ power button or slider.

How can I get it to auto-switch off?

I'm on CSSU TEsting 3.1, so it might be one of the issues it currently has, but I haven't found anything of the likes in CSSU threads (may have overlooked it...)