HOWTO Fix A Buggy DSDT File

Hi I'm having trouble with a Toshiba satellite L775-V13. The laptop overheats and shuts down, has no brightness control
and very little battery-life.

Quote:

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ima@ima-SATELLITE-L775-13V:~$ iasl -tc /home/ima/dsdt.dsl

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20100528 [Oct 1 2012]
Copyright (c) 2000 - 2010 Intel Corporation
Supports ACPI Specification Revision 4.0a

/home/ima/dsdt.dsl 22927: Add (Local1, 0x01)
Warning 1106 - Result is not used, operator has no effect ^

/home/ima/dsdt.dsl 24933: Method (BBSF, 5, NotSerialized)
Warning 1088 - ^ Not all control paths return a value (BBSF)

/home/ima/dsdt.dsl 24945: Method (HWID, 5, NotSerialized)
Warning 1088 - ^ Not all control paths return a value (HWID)

/home/ima/dsdt.dsl 24960: Method (XPAP, 4, NotSerialized)
Warning 1088 - ^ Not all control paths return a value (XPAP)

ASL Input: /home/ima/dsdt.dsl - 25685 lines, 795158 bytes, 12647 keywords
AML Output: /home/ima/dsdt.aml - 103127 bytes, 2411 named objects, 10236 executable opcodes

Compilation complete. 0 Errors, 4 Warnings, 0 Remarks, 4206 Optimizations

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I have already messed with this bringing the number of warnings down (following the tutorial)
but I can't get around the remaining ones.

I hope someone can help !