I'm in the same boat as you. I've never seen the DSDT workaround actually
work. I've created a new DSDT.dsl file by:

   - extracting and reverse engineering the original DSDT.dsl from the
   bios
   - changing variables that look like _T_0 to T_0
   - changing some strings that look like "*PNP0C14" to "PNP0C14"
   - and editing the all important "Linux" section to look like the
   snippet below (other people have modified their .dsl slightly differently,
   but this approach looks the safest to me).
   - then I create a new DSDT.aml file (iasl -tc DSDT.dsl)
   - I copy the file over to the initial ramfs location (cp
DSDT.aml/etc/initramfs-tools/)
   - and create a new ram disk (mkinitramfs -o /boot/initrd.img-
   2.6.22-13-generic)


The kernel log says it loads the DSDT.aml file when I reboot, but the sound
doesn't work. Apparantly this workaround used to work in Fiesty Fawn. I was
on FF and the workaround didn't work for me. When I tried asking about it
(and created a bug) I was told I had to be on GG to report this bug. I
switched, and found that we're all experiencing this problem. I don't know
when FF stopped working - some people have reported that the fix used to
work. I should also say that I have BIOS 4.0 for the laptop (I upgraded
recently).

So, if you want sound, you can boot your laptop by adding "acpi=off" at the
end of the kernal options in GRUB (just press E to edit on next reboot to
try it temporarily). BUT, when ACPI is off, it can lead to things like your
CPU overheating I am told. I think this can wreck your hardware. My machine
froze after a while.

I'm just waiting (more like praying) for a FIX. PLEASE PLEASE.... I want
SOUND!!

I would even pay money for the fix.

Enough of my rant. (Probably more than you needed to know)

=== snippet of DSDT.dsl ====
    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)
                    }
/*
                }
            }
*/
        }



On 10/10/07, Luis Suárez <email address hidden> wrote:
>
> I just upgraded to 2.6.22-14-generic and I can confirm there is still no
> sound with or without custom DSDT.
> I konw there is a workaround, and I would be very nice if (even when I
> know this will be fixed soon) someone explain us noobs how to get this patch
> working.
>
> --
> toshiba p100 series dsdt acpi error no sound, works with acpi turned off.
> https://bugs.launchpad.net/bugs/136469
> You received this bug notification because you are a direct subscriber
> of the bug.
>



-- 
Rob Armstrong
Solution Architect, Senior Partner
Application Elements
780.965.0729
www.applicationelements.com