HOWTO Fix A Buggy DSDT File

[snoopy33]

Hi to all,

I m trying to patch myself the dsdt, I m not sure to understand how to do...

I use the how to from http://forums.opensuse.org/new-user-...uggy-dsdt.html

I ve decompiled the dsdt, go to the buggy line, and after, i try to look for Method (_HOT, 0, NotSerialized), but not so much response... don t know what to do !

Can anyone help me ???

Thanks in advance.

[snoopy33]

I fix myself most of the errors by adding return(zero) but i don t find any help for _HOT, 0, NotSerialized, google has only 3 answers...

Have an idea ?

[krantix]

It will not be supported. See post #343.

I've seen that, but toshiba will never fix the DSDT.

I can't use my laptop without the DSDT fix. I've tried http://gaugusch.at/kernel.shtml but it does not work with 2.6.31-14.

[67GTA]

I fix myself most of the errors by adding return(zero) but i don t find any help for _HOT, 0, NotSerialized, google has only 3 answers...

Have an idea ?

Change the _HOT method at the end from:

Release (\_SB.PCI0.LPC.EC.ECMX)
                    Multiply (Local0, 0x0A, Local0)
                    Add (Local0, 0x0AAC, Local0)
                    Return (Local0)
                }
            }

to

Release (\_SB.PCI0.LPC.EC.ECMX)
                    Multiply (Local0, 0x0A, Local0)
                    Add (Local0, 0x0AAC, Local0)
                    Return (Local0)
                }
             Return (0x00)
            }

The _T_X remarks are usually harmless, but to get rid of them, replace with any three letter combo plus the number. For example, I'll use "cat". _T_0 will become cat0, _T_1 will become cat1, etc. The rest are just complaints that can be gotten rid of by adding a null value to shut iasl up as you have already seen. You didn't have any errors, so the kernel can probably work around all of these without a custom DSDT. Look for kernel/ACPI errors by running "dmesg" in a terminal.

[67GTA]

I've seen that, but toshiba will never fix the DSDT.

I can't use my laptop without the DSDT fix. I've tried http://gaugusch.at/kernel.shtml but it does not work with 2.6.31-14.

You have to recompile the kernel to apply this patch. Once you do that, it is YOUR kernel, and no longer get updates or patches from Debian/Ubuntu. You have to manually download and apply these and recompile again each time a security/driver update comes out.

[deslos]

hello there,

I have a nx7400 notebook, and my DSDT file is the one attached, is it fixable ?
do you have any hints for me?

thanx in advance

./deslos

when I compile it, I get

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20080926 [Oct  4 2008]
Copyright (C) 2000 - 2008 Intel Corporation
Supports ACPI Specification Revision 3.0a

dsdt.dsl  2829:                     Method (_BCQ, 0, Serialized)
Warning  1098 -          Unknown reserved name ^  (_BCQ)

dsdt.dsl  9988:                         If (LEqual (C2C6 (0x00), 0x01))
Warning  1092 -                                        ^ Called method may not always return a value

dsdt.dsl 10012:                         If (LEqual (C2C6 (0x01), 0x01))
Warning  1092 -                                        ^ Called method may not always return a value

dsdt.dsl 10889:             Method (C2C6, 1, NotSerialized)
Warning  1087 -                        ^ Not all control paths return a value (C2C6)

ASL Input:  dsdt.dsl - 13745 lines, 503959 bytes, 6381 keywords
AML Output: ./dsdt.aml - 60653 bytes, 1080 named objects, 5301 executable opcodes

Compilation complete. 0 Errors, 4 Warnings, 0 Remarks, 2154 Optimizations

[67GTA]

deslos:

Compilation complete. 0 Errors, 1 Warnings, 0 Remarks, 2156 Optimizations

I left the one warning. It is a Vista entry to control the backlight. It will not cause the Linux kernel any problems. There is no way to get rid of it except removing it all together which screws up the rest of the dsdt.

dsdt.aml.zip

[lui777]

Hi 67GTA, please would you tell me which correction you made in the dsdt.dsl a user send you in a past post to avoid these warnings?

lu@lu-laptop:~$ iasl -tc dsdt.dsl

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20090521 [Jun 30 2009]
Copyright (C) 2000 - 2009 Intel Corporation
Supports ACPI Specification Revision 3.0a

dsdt.dsl 2934: Acquire (MUT0, 0x0FFF)
Warning 1104 - Possible operator timeout is ignored ^

dsdt.dsl 5651: Acquire (MUTE, 0x03E8)
Warning 1104 - ^ Possible operator timeout is ignored

dsdt.dsl 5665: Acquire (MUTE, 0x03E8)
Warning 1104 - ^ Possible operator timeout is ignored

dsdt.dsl 5680: Acquire (MUTE, 0x03E8)
Warning 1104 - ^ Possible operator timeout is ignored

dsdt.dsl 5695: Acquire (MUTE, 0x0FFF)
Warning 1104 - ^ Possible operator timeout is ignored

dsdt.dsl 5709: Acquire (MUTE, 0x03E8)
Warning 1104 - ^ Possible operator timeout is ignored

dsdt.dsl 5724: Acquire (MUTE, 0x03E8)
Warning 1104 - ^ Possible operator timeout is ignored

dsdt.dsl 5739: Acquire (MUTE, 0x03E8)
Warning 1104 - ^ Possible operator timeout is ignored

ASL Input: dsdt.dsl - 9617 lines, 292742 bytes, 4433 keywords
AML Output: dsdt.aml - 33391 bytes, 1068 named objects, 3365 executable opcodes

Compilation complete. 0 Errors, 8 Warnings, 0 Remarks, 1139 Optimizations

Thank you in advance!

Luigi

[VXxed]

Hey, I'm getting one warning on line 2098. I fixed the other error there was by simply deleting the line. Originally, I got this:

ronen@vxtablet:~$ iasl -tc dsdt.dsl

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20090521 [Jun 30 2009]
Copyright (C) 2000 - 2009 Intel Corporation
Supports ACPI Specification Revision 3.0a

dsdt.dsl    23:     External (\DC1S)
Error    4056 -                    ^ Name already exists in scope (\DC1S)

dsdt.dsl  2098:                     Method (SBLL, 1, NotSerialized)
Warning  1087 -                                ^ Not all control paths return a value (SBLL)

ASL Input:  dsdt.dsl - 5888 lines, 210890 bytes, 2615 keywords
Compilation complete. 1 Errors, 1 Warnings, 0 Remarks, 473 Optimizations

If at all possible, could you take a look and see if there's any fan control in there? I'm having issues with my fan actually turning on on this laptop. Thanks a lot!

[67GTA]

Hi 67GTA, please would you tell me which correction you made in the dsdt.dsl a user send you in a past post to avoid these warnings?





Thank you in advance!

Luigi

Acquire (MUT0, 0x0FFF)

Replace and

Acquire (MUTE, 0x03E8 )

with

Acquire (MUT0, 0xFFFF)