Issues with keyboard backlight

whang2011

Hi, I am facing some issues with my arch installation.
a. The Dell Vostro V131 (Backlight) Keyboard backlight is set to full. The keyboard light is set to 0 till end, but just before lightdm starts the keyboard';s backlight is set to full brightness.
    Things tried: I can manually set the brightness level (currently use a script binded to a key to do so), but am not able to do so at boot. I currently use systemd for initialising. Adding a .service file in /etc/systemd/system/ is not helping. Moreover, I would like prevent the first change rather than resetting it.
b. I am not able to control the fan speed. Even though I would like to have the fan speed dependent on temperature, but no tool (macfancontrold etc are able to help) seems to work. Anyhow, can someone suggest how to directly change the fan speed.
Thanks