Bug 8267

Summary:	ACPI/sound issue with Toshiba laptop P100-473
Product:	ACPI	Reporter:	fred (fredmfp)
Component:	BIOS	Assignee:	acpi_bios
Status:	REJECTED DUPLICATE
Severity:	normal	CC:	acpi-bugzilla
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.20.3	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	patch vs 2.6.21-rc5 to remove "Linux" from kernel _OSI strings complete acpidump file log DSDT diff between original & modified files

Description fred 2007-03-27 04:27:21 UTC

Most recent kernel where this bug did *NOT* occur:
Distribution: Debian etch
Hardware Environment: toshiba P100-473 (intel)
Software Environment:
Problem Description:

Hi, 

I'm posting here from Len Brown advice.

This is a well-known issue, I know.
So I have browsed http://acpi.sourceforge.net/dsdt/view.php
but I did not see my model (aka PSPAGE-00S011FR).
So I have followed
http://forums.gentoo.org/viewtopic-t-444743-highlight-sndhdaintel.html 
which has almost fixed issues (ie ACPI enabled + sound works perfectly).

By the way, that fix seems to break elsewhere: for instance, keyboard does not
work anymore as expected (a few multimedia keys are broken).

Steps to reproduce:
I have modified a few lines in my original DSDT, as described in the gentoo's forum:
- replace all occurences of _T_[0-7] by something else because iasl does not
like them;
- complete the return path for method BTST with Return (Zero)
- replace "*PNP0C14" by "PNP0C14"
- comment a few lines in Scope (\_SB) and added to the end the line
  Store (0x07D6, OSYS)
which is commented as "Fake Windows 2006" in the gentoo's forum. 

Please note that if the only last line (Store (0x07D6, OSYS)) is omitted,
sound does not work (and keyboard works fine ;-)

Thanks in advance for any help.

Cheers,

Comment 1 Len Brown 2007-03-28 10:41:53 UTC

> - replace "*PNP0C14" by "PNP0C14"

The Linux/ACPI interpreter includes a workaround to ignore the
leading '*' in PNP-id's.  However, iASL requires that you address
this if you want to build your DSDT.

PNP0C14 is the id for Windows Management Instrumentation (WMI)
which Linux does not support, so you should get the same results
if you delete this device from the DSDT entirely.
(though this reminds me, Linux should warn when it finds
 PNP0C14 that it can't talk to the platform's windows-specific hooks)

Please attach the complete output from acpidump, plus
the diff showing the changes you made to get sound to work.
Store (0x07D6, OSYS) sounds like it might be an _OSI issue.

Comment 2 Len Brown 2007-03-28 11:00:59 UTC

Looking on the gentoo forums link, I see this:

    Scope (\_SB) 
      { 
          Method (_INI, 0, NotSerialized) 
          { 
              If (DTSE) 
              { 
                  TRAP (0x47) 
              } 
   
              Store (0x07D0, OSYS) 
  //             If (CondRefOf (_OSI, Local0)) 
  //             { 
  //                 If (_OSI ("Linux")) 
  //                 { 
  //                     Store (0x03E8, OSYS) 
  //                 } 
  //                 Else 
  //                 { 
  //                     Store (0x07D1, OSYS) 
  //                     If (_OSI ("Windows 2001 SP2")) 
  //                     { 
  //                         Store (0x07D2, OSYS) 
  //                     } 
   
  //                     If (_OSI ("Windows 2001.1")) 
  //                     { 
  //                         Store (0x07D3, OSYS) 
  //                     } 
   
  //                     If (_OSI ("Windows 2001.1 SP1")) 
  //                     { 
  //                         Store (0x07D4, OSYS) 
  //                     } 
   
  //                     If (_OSI ("Windows 2006")) 
  //                     { 
  //                         Store (0x07D6, OSYS) 
  //                     } 
   
  //                     If (LAnd (MPEN, LEqual (OSYS, 0x07D1))) 
  //                     { 
  //                         TRAP (0x3D) 
  //                     } 
  //                 } 
  //             } 
           Store (0x07D6, OSYS)  // Fake Windows 2006 
          } 

The issue here is that the BIOS is explicitly looking for "Linux"
and  setting OSYS based on that.  When I get your acpidump, we can
look at what the AML does with OSYS, but the quick thing to try
right now is to boot with the original BIOS with "acpi_osi="
which will disable _OSI support alltogether.  It will not cause
the BIOS to go down the WinXP path, but it will prevent it from
going down the "Linux" path, whatever that turns out to be.

Comment 3 Len Brown 2007-03-28 11:16:41 UTC

Created attachment 10973 [details]
patch vs 2.6.21-rc5 to remove "Linux" from kernel _OSI strings

This patch removes "Linux" from the pre-defined kernel _OSI strings.
Please try it out using the unmodified BIOS and without
the use of the acpi_osi= parameter.

It will cause the BIOS to not take the "Linux" path above.
But until we review the actual DSDT, it is a guessing game
exactly what effect(s) this will have on the system.

Comment 4 Len Brown 2007-03-28 11:21:02 UTC


*** This bug has been marked as a duplicate of 7787 ***

Comment 5 fred 2007-03-28 12:17:04 UTC

Created attachment 10974 [details]
complete acpidump file log

Comment 6 fred 2007-03-28 12:29:23 UTC

Created attachment 10975 [details]
DSDT diff between original & modified files

Comment 7 fred 2007-03-28 12:42:47 UTC

bugme-daemon@bugzilla.kernel.org a

Comment 8 fred 2007-03-28 13:34:30 UTC

bugme-daemon@bugzilla.kernel.org a