ACPI language / _SB_ or _SB

[ezsolt]

I am having troubles to get my custom ssdt working. It is a tiny ssdt like Pike's.

The NVIDIA injection is working however I can not get the HDAS to HDEF renaming stuff to work. I wondered if this is because the different external declarations? What is the difference between _SB_ or _SB?

In case somebody is interested in the ssdt: https://github.com/Voight-Kampf/ubik/blob/master/machine/GA-H170N-WIFI/fixes/tinyssdt/ubik.dsl. The ssdt is for a GA-H170N-WIFI mobo.

I mainly made this to get rid of the clover .config fixes, and to learn.

 

[RehabMan]

I am having troubles to get my custom ssdt working. It is a tiny ssdt like Pike's.

The NVIDIA injection is working however I can not get the HDAS to HDEF renaming stuff to work. I wondered if this is because the different external declarations? What is the difference between _SB_ or _SB?

In case somebody is interested in the ssdt: https://github.com/Voight-Kampf/ubik/blob/master/machine/GA-H170N-WIFI/fixes/tinyssdt/ubik.dsl. The ssdt is for a GA-H170N-WIFI mobo.

I mainly made this to get rid of the clover .config fixes, and to learn.

_SB_ and _SB are the same.
All ACPI names are 4 characters. Always. It is so they can be handled as a 32-bit integer in the implementation (efficiency).
Shorter names are padded with underscore to make 4 characters.

So...
_SB is _SB_
XHC is XHC_
A is A___
AB is AB__
ABC is ABC_

 

[ezsolt]

thanks @RehabMan

Is there a site for learning ACPI?
I could not find one for beginners

 

[RehabMan]

thanks @RehabMan

Is there a site for learning ACPI?
I could not find one for beginners

Google for the ACPI specification.