Just a quick post to let GA-P55M-UD2 owners know that I've changed the HDEF section of code in the default tonymacx86-DSDT-FIXES.zip DSDT.aml so that you no longer have to use the old AppleHDA.kext! I've modified the ALC 888b code in the DSDT for the P55M-UD2 so that the LegacyHDA_888b.kext now works with the vanilla 10.6.2 AppleHDA!
You must update to the latest GA-P55M-UD2 bios for this to work! Also, please note that you must enable the proper output in System Preferences/Sound.
I updated all of the files that utilize the UD2 DSDT. Here are some links for all of you UD2 owners. Post your results with this new tweak in the forum here.
Updated tonymacx86-DSDT-FIXES.zip
Includes updated GA-P55M-UD2 DSDT.aml with fixes for CMOS reset, UHCI/EHCI, IDE (SATA), PIC/TMR/HPET, SBUS, and HDEF.
http://www.tonymacx86.com/Public/tonymacx86-DSDT-FIXES.zip
10.6.2 Vanilla AppleHDA.kext
http://www.tonymacx86.com/Public/10.6.2%20AppleHDA.kext.zip