For those with audio chip like this (ALC889a, mother board Gigabyte EP35-DS3r, using AppleHDA.kext) who have lost sound with Snow Leopard 10.6.3 and don't like VoodooHDA.kext due to the very low volumes, here it's a possible solution.
Tmongkol has a thread in another forum, "ALC889A, Gigabyte (Intel), and other ALC88#(x)", which offers some LegacyHDA.kext that, added to vanilla AppleHDA.kext and HDEF code in DSDT, has returned the excellent sound I has before.
How to:
- install v
anilla AppleHDA.kext from Snow Leopard 10.6.3
- install
LegacyHDA.kext from Tmongkol (links in the first post, besides "Series of LegacyHDA.kext for Gigabyte ALC888 and ALC889a 10.5.8 & SL Ready"), I've tried the kext in the folder "
3out2in HDA headphone"
-
modify DSDT:
1. Find
...
Notify (\_SB.PWRB, 0x02)
Notify (\_SB.PCI0.
AZAL, 0x02)
...
and replace
...
Notify (\_SB.PWRB, 0x02)
Notify (\_SB.PCI0.
HDEF, 0x02)
...
2. Find "Name (_ADR, 0x001B0000)", usually it's the sound device, and change to:
Code:
Device (HDEF)
{
Name (_ADR, 0x001B0000)
Method (_PRW, 0, NotSerialized)
{
Return (Package (0x02)
{
0x0D,
0x05
})
}
Method (_DSM, 4, NotSerialized)
{
Store (Package (0x0A)
{
"built-in",
Buffer (0x01)
{
0x01
},
"codec-id",
Buffer (0x04)
{
0x85, 0x08, 0xEC, 0x10
},
"layout-id",
Buffer (0x04)
{
0x75, 0x03, 0x00, 0x00
},
"device-type",
Buffer (0x10)
{
"Realtek ALC889A"
},
"PinConfigurations",
Buffer (0x28)
{
/* 0000 */ 0x10, 0x90, 0xA1, 0x01, 0x20, 0x90, 0xA1, 0x02,
/* 0008 */ 0x80, 0x30, 0x81, 0x01, 0x90, 0x40, 0x21, 0x02,
/* 0010 */ 0x30, 0x40, 0x11, 0x01, 0x40, 0x40, 0x01, 0x01,
/* 0018 */ 0x50, 0x60, 0x01, 0x01, 0x60, 0x20, 0x01, 0x01,
/* 0020 */ 0x70, 0x61, 0x4B, 0x01, 0xA0, 0x01, 0xCB, 0x01
}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}
}
The "Name (_ADR, 0x001B0000)" device can be found as AZAL if you have never injected audio in DSDT:
Code:
Device (AZAL)
{
Name (_ADR, 0x001B0000)
Method (_PRW, 0, NotSerialized)
{
Return (Package (0x02)
{
0x0D,
0x05
})
}
}
In short, to change AZAL by HDEF and to include the audio codec data and the DTGP method.