Psst. On certain motherboards Dell just removed the option from the UI but the implementation is still there. They also oh so helpfully store their config in EFI variables so... If you're lucky you can just flip the right bit and enable S3 sleep again. For example the G5 5505 has it in D01SetupConfig and you just need to find the right offset that corresponds to it. https://www.reddit.com/r/DellG5SE/comments/kpg3ez/how_to_dis...