Cesare Pagliari posted a file in DSDT
273 downloadsI'm a newbie but i patched my DSDT and it works perfectly for me. I run Mavericks 10.9.0 on my Acer V5-571g mainboard intel h77 Ivy Bridge CPU i5 3317U and HD4k. I removed all other graphic kext Nvidia, GeForce and Ati. Now this DSDT add the brightness bar in System preferences.