Sorry for the long delay! Here's my rc.local.
Originally Posted by Kopkins
When I enter "4" for X on the command you supplied, it dims my screen to almost off, which is what I would expect, however the rc.local doesn't seem to be doing this on boot or wake from sleep. Do I need to include a sudo su command or something in rc.local? Is there another reason why the screen is still defaulting to 1000 suns brightness possibly? Thanks for the help so far!
#$backlight_brightness range 0-82311
echo $backlight_brightness > /sys/devices/virtual/backlight/apple_backlight/subsystem/gmux_backlight/brightness
#$kbd_brightness range 0-255
echo $kbd_brightness > /sys/class/leds/smc\:\:kbd_backlight/brightness
echo 4 > /sys/devices/virtual/backlight/apple_backlight/subsystem/gmux_backlight/brightness