Why does my DSDT table is different from what I found online?
- by Hao Shen
I have found a field in DSDT table where I want to modify from here
http://www.ztex.de/misc/c2ctl.e.html
Generally, I want to modify the _PSS field about the processor so that I can have more frequency levels available in the CPUfreq driver interface.
I try to use this command to dissemble the DSDT table from my Desktop(Linux2.6.29,Intel CORE 2):
cat /proc/acpi/dsdt > dsdt.aml
iasl -d dsdt.aml
Then I have a file dsdt.dsl as following(very long, so I just show the beginning of the file):
/*
* Intel ACPI Component Architecture
* AML Disassembler version 20090123
*
* Disassembly of dsdt.aml, Mon May 6 20:41:40 2013
*
*
* Original Table Header:
* Signature "DSDT"
* Length 0x00003794 (14228)
* Revision 0x01 **** ACPI 1.0, no 64-bit math support
* Checksum 0x46
* OEM ID "DELL"
* OEM Table ID "dt_ex"
* OEM Revision 0x00001000 (4096)
* Compiler ID "INTL"
* Compiler Version 0x20050624 (537200164)
*/
DefinitionBlock ("dsdt.aml", "DSDT", 1, "DELL", "dt_ex", 0x00001000)
{
Method (DBIN, 0, NotSerialized)
{
Noop
}
Scope (\)
{
Device (_SB.VBTN)
...................
But I can not find the _PSS field as shown in the website I have given above. I do not know why? I am sure the current cpufreq driver shows 4 frequency levels available. So at least there should be something in the table showing this..right?
Has anybody here played with the DSDT table before? Thanks,
