Hello, thanks to Yo Luming I was pointed towards the fact that my dsdt is broken. A few days ago I read an article about this in paper and it said that iasl from Intel can be used to repair the dsdt. Well, I began with lots of error and now I'm down to 1 error and some warnings (Well, ok until now it wasn't too hard :). Can somebody please have a look at my dsdt.dsl and help me out? Ty Sebastian Intel ACPI Component Architecture ASL Optimizing Compiler / AML Disassembler version 20030918 [Sep 18 2003] Copyright (C) 2000 - 2003 Intel Corporation Supports ACPI Specification Revision 2.0b dsdt.dsl 735: Return (^C08E (Arg0, Arg1, Arg2)) Error 1029 - ^ Called method returns no value dsdt.dsl 1126: Method (C0B3, 2, Serialized) Warning 2019 - ^ Not all control paths return a value (C0B3) dsdt.dsl 2161: Store (Package (0x00) {}, Local0) Warning 2018 - Effective AML package length is zero ^ dsdt.dsl 2198: Store (Package (0x00) {}, Local0) Warning 2018 - Effective AML package length is zero ^ dsdt.dsl 2235: Store (Package (0x00) {}, Local0) Warning 2018 - Effective AML package length is zero ^ dsdt.dsl 2374: Method (_DIS, 0, NotSerialized) Warning 2019 - ^ Not all control paths return a value (_DIS) dsdt.dsl 2724: Method (_DIS, 0, NotSerialized) Warning 2019 - ^ Not all control paths return a value (_DIS) dsdt.dsl 2920: Method (_DIS, 0, NotSerialized) Warning 2019 - ^ Not all control paths return a value (_DIS) dsdt.dsl 3085: Method (_DIS, 0, NotSerialized) Warning 2019 - ^ Not all control paths return a value (_DIS) dsdt.dsl 3300: Method (C136, 0, NotSerialized) Warning 2019 - ^ Not all control paths return a value (C136) dsdt.dsl 4778: If (\_SB.C005.C0AE.C0B3 (0x02, 0x01)) Warning 2030 - ^ Called method may not always return a value ASL Input: dsdt.dsl - 5114 lines, 155669 bytes, 2988 keywords Compilation complete. 1 Errors, 10 Warnings, 0 Remarks, 1119 Optimizations