Re: Help with the DSDT for an Acer Ferrari 3400 laptop

["Pedro I. Sanchez" <pedro.sanchez-bJEeYj9oJeDQT0dZR+AlfA@public.gmane.org>]

Bruno Ducrot wrote:
> On Tue, Dec 28, 2004 at 12:38:37AM -0500, Pedro I. Sanchez wrote:
> 
>>Hello,
>>
>>I'm new to this ACPI world and I'd like your help to fix the dsdt.dsl 
>>file that I got with this laptop. I followed the steps in the ACPI FAQ 
>>to disassemble the bin file and ended up with a source file that 
>>compiles with 8 errors and 1 warning using the Intel ASL compiler.
>>
>>For your reference the problem I want to fix is that I have no control 
>>over the fan which is always on, quite annoying. Even though my Linux 
>>kernel has compiled ACPI fan support the directory /proc/acpi/fan is 
>>empty. I'm running vanilla kernel 2.6.10 with Debian-AMD64.
>>
>>The good news is that the 8 errors are actually the same one spread all 
>>over the source file. So fixing it once will fix the whole file. The bad 
>>news is that I don't know how to fix it :|
>>
>>The Error
>>---------
>>dsdt.dsl  4480:           If (LLess (\_PR.CPU0._PPC, Local1))
>>Error    1022 -             Object does not exist ^  (\_PR.CPU0._PPC)
>>
>>The error is repeated every time the object \_PR.CPU0._PPC appears in 
>>the code. I read in the FAQ that one possible solution is to use the 
>>statement
>>
>>	External(\_PR.CPU0._PPC)
>>
>>to tell the compiler that this is an external object. However I don't 
>>understand where this External statement should go. I've tried putting 
>>it at the beginning of the file and inside the Scope(\_PR) section which 
>>simply reads
>>
>>	Scope (\_PR)
>>	{
>>	   Processor (CPU0, 0x00, 0x00004010, 0x06) {}
>>	}
>>
>>In both cases the compiler complains. So, where shall this External 
>>statement go?
> 
> 
> They go to a SSDT table likely.  If you do something like:
> sudo ./acpidmp SSDT > ssdt
> and
> iasl -d ssdt
> you should get those external statements.
> 

I'm looking for acpidmp in my Debian box but I can't find it, it's not 
in the pmtools package. And I can't find it in the Intel's download page 
either (http://www.intel.com/technology/iapc/acpi/downloads.htm). Where 
can I get it?

Also, what am I supposed to do after disassembling the ssdt?

> 
>>The Warning
>>-----------
>>dsdt.dsl  4287: Method (SMSL, 0, NotSerialized)
>>Warning  2019 -            ^ Not all control paths return a value (SMSL)
>>
>>I added a Return (0x00) statement at the very end of the method and the 
>>warning disappeared. But, is this right? Following my signature you will 
>>find the code of the offending method including my extra line.
> 
> 
> Could you send me the original DSDT please (or better the full acpidmp)
> or even better provide a link?
> 

You will find the DSDT and some other files at http://www.colcan.biz

> I don't think it's very problematic, but I need to look a little bit
> further to be sure.  This method is "internal" and is called by other
> methods, so need to check what those methods do with the return value.
> 
> Cheers,
> 
Thank you for your follow up.

-- 
Pedro


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