On my ThinkPad W520 laptop, after a short period of inactivity (eg. no mouse movement) on battery, the screen dims for power saving. When I move the mouse (ie. , the screen lights back up, but not at the same level (darker) than it was before.
I've seen some code a while ago with X managing the dimness (?) but can't remember where it was. Maybe I can configure something in X or somehow do something with it?
Who is responsible for lighting the screen up when the mouse moves? How do I make it go back to its original setting when it becomes active again?