warty

I have an Asus N550JV running High Sierra 10.13.5. After weeks of struggling to get the keyboard backlight controls working using EMlyDinEsH's AsusNBFnKeys.kext & ApplePS2SmartTouchpad.kext with the 4-levels DSDT patch, I can finally control the keyboard backlight levels using Fn+F3 and Fn+F4. Although EMlyDinEsH's instructions indicate (if I read the instructions correctly) that the 4-levels patch for "Haswell/Ivy" should have worked for my laptop, which has an i7-4700HQ processor (Haswell), it turned out that I actually needed the "Sandy/Ivy" patch instead. The difference boils down to this line: ^^PCI0.LPCB.EC0.WRAM (0x04B1, Local1) // Haswell/Ivy versus ^^PCI0.LPCB.EC0.WRAM (0x044B, Local1) // Sandy/Ivy I noticed that my native DSDT extracted via Clover used 0x044B in method SLKB, not the 0x04B1 that the Haswell patch was using for method SKBL. It was only after I decided to try the Sandy value that the keyboard backlight finally started working. The Asus N550JV is an older-model laptop, so it's possible that my experience won't help anyone else. But who knows? There might be one or two out there who can use this info.