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These days with new Lilu.kext and WhateverGreen.kext, ACPI power management is taken care of by using PluginType1 like SSDT-PLUG.aml. The old way of using SSDTPRGEN.sh seems to go away, but I’ve found for some laptops with Catalina, this one is still the best for sleep/wake, speed steps and performing just like Windows would.
Up to Catalina 15.3, everything seems to be straight forward, but when it comes to the latest Catalina 15.4, it’s quite a hurdle to get it to work. It needs , , to get it to boot. The amazing thing is with these, DSDT and SSDT no longer need to be patched it seemed, everything