Depending on my 10.14.4 installation are clean install or editing on current installation, SSDT-PNLF work with few EDID patch. With default LGD0215 EDID on a clean install, brightness control show and work perfectly. After patch to inject 9C7C, A030 and various Apple MacBook Color LCD PID still working. But when all my works on patching is done, and i want to re-install a fresh installation with all new config and patches, brightness control slider is gone. Changing SMBIOS model affect this too. As my build, i7 3740QM using HD 4000 Graphics, the tips on Clover Configurator and Hackintools recommending MacBookPro 9,1 and MacBookPro 9,2 SMBIOS but both SMBIOS give me AGPM P-State fault. Currently, i am using MacBookPro10,1 config but with a clean install of 10.14.4 / A030 Display SSDT-PLNF does'nt work at all, my fix are changing to 9C7C Display then switch back to A030. May be on specific LCD model cause this problem, i'm now going to test the ambient light sensor to see what's different with that.