FS#8400 - Option to keep backlight off while changing volume etc.
Some operations — like changing volume, switching to next song etc. — just don't require looking at the screen or even taking the DAP out of one's pocket. Nevertheless rockbox will turn power-expensive and sometimes annoying backlight on for every single keypress.
The patch adds an option to prevent any button but SELECT and/or POWER from turning backlight on, thus providing some king of manual backlight control.
The patch was tested on Sansa C200. It should work fine on other players as well, but the choise of buttons may not be the best one and may require tweaking.
This task depends upon