Can you please help me?, I'm really desperate. Same problem, everything was fine before I followed dosdudes instructions for Mojave install and deactivated the GPU. I actually succesfully installed Mojave, but because of other reasons, after half a year I downgraded again to High Sierra 10.3.6, and the brightness adjust and sleep mode are not working at all. The nvram CMD-OPT-P-R reset hasn't worked, even with the SMC reset. I'm just trying to get my laptop to be the way it was before I followed these instructions, it had np issues with the GPU. SOMEONE PLEASE PLEASE HELP ME

(( id be really grateful. These are the o instrcutions i followed