Attached Object 0x55c5a338d9b0: 0000: 00 00 00 00 00 00 00 00 0E 11 01 00 00 01 00 01 // ................ 0010: 90 94 38 A3 C5 55 00 00 08 00 00 00 C1 00 00 00 // ..8..U.......... 0020: 00 00 00 00 00 00 00 00 10 3F 38 A3 C5 55 00 00 // .........?8..U.. 0030: 00 00 00 00 00 00 00 00 80 00 00 00 00 00 00 00 // ................ 0040: 00 00 00 00 00 00 00 00 // ........ Type : 11 [RegionField] Reference Count : 0001 Flags : 00 Object List : (nil) - No attached objects Field Flags : 01 Access Byte Width : 01 Bit Length : 00000008 Field Bit Offset : 00 Base Byte Offset : 000000C1 Parent Node : 0x55c5a3389490 [CMMD] AccessLength : 00 Region Object : 0x55c5a3383f10 ResourceBuffer : (nil) I am nervous about adding a call to write that region field to the thinkpad_acpi driver, but there does not appear to be another way to modify the entry. I've searched for CMMD and PMMD in the dsdt.dsl and haven't found a way to modify them. Any help would be appreciated. Thanks, Liam R. Howlett