Disabling CABC - i9505
I have an i9505 running a stock Google Edition ROM and am having trouble disabling the CABC. To clarify, CABC is a function which dynamically adjusts the brightness of the display based on the content being displayed. It is separate from automatic brightness control and can be disabled in the stock TouchWiz ROM by unchecking an option called "Save power by adapting the screen to the content being displayed" or something similar. Said option is not present in the stock Google Edition ROM.
There are a few other Google Edition ROMs which include the "Advanced" settings section and allow me to disable CABC, but they are incompatible with my baseland (can't use mobile data or make calls). I did manage to find the following init.d script for the Nexus 4 which does what I need, but it doesn't work on the i9505.
echo 0 > /sys/class/backlight/s6e8aa0/acl_set
I would greatly appreciate any assistance in this matter.