auto swich headphones and speaker
no bug left - right and volume mic
my laptop is acer 4830 with Conexant Cx20588
Mac os 10.7.4->10.8.1


1. Remove appleHDA.kext

2. add DSDT> HDEF

Method (_DSM, 4, NotSerialized)
{
Store (Package (0x06)
{
"hda-gfx",
Buffer (0x0A)
{
"onboard-1"
},

"layout-id",
Buffer (0x04)
{
0x1C, 0x00, 0x00, 0x00
},

"PinConfigurations",
Buffer (Zero) {}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}