I have seen some questions on turning HDMI screens off but my question concerns GPIO attached touchscreens. When I run
sudo halt -h on my b+, the OS(hacked version of Raspbian to work with touchscreen) shuts down.
However, the back-light stays on giving me a bright white screen. I assume this is because the 5v pin is still supplying 5 volts to the screen.
To fix this I know I could wire a switch in series with the power supply or just pull out the cord but I would like to avoid the extra step. Is there a software solution for this to turn the screen off?