Comment 57 for bug 1983180

Created attachment 301317
patch with potential fix: Only let cppc_acpi run if CPPCv2 was not masked

OK, it looks like the SSDT only loads if CPPCv2 was acked, which in your system only CPPCv1 was acked.

>>> result = 59
>>> result & OSC_SB_CPCV2_SUPPORT
0
>>> result & OSC_SB_CPC_SUPPORT
32

Try this updated patch which won't let it probe _CPC further in that specific case.