Difference of AppleACPIPlatform.kext from 10.8.1 to 10.8.2

[FilterPunk]

It is probably not new to many of us that updating to 10.8.2 is not working oob in all cases.
I have read that in some cases deleting OemSMBIOS.kext from the Plugins directory of the FakeSMC.kext
helps. SInce I did not have any Plugins Folder in FakeSMC (apparently I am using an older version)
in my case (GA-Z68X-UD3H-B3 with UEFI) I had to rollback AppleACPIPlatform.kext to 10.8.1.
Ok, works. But why?
Has anybody more knowledge why the 10.8.2 AppleACPIPlatform.kext breaks my system.

 

[Scrambler77]

I've just updated to 10.8.2 and AppleACPIPlatform.kext works well, but has an issue with my X58 chipset: causes a much more slower boot process.

Using the rollback version from multibeast i've managed to restore the boot speed i had before the update, but osx cannot detect the machine serial number, causing icloud malfunctions.

No more problems detected.

 

[harmcore]

It is probably not new to many of us that updating to 10.8.2 is not working oob in all cases.
I have read that in some cases deleting OemSMBIOS.kext from the Plugins directory of the FakeSMC.kext
helps. SInce I did not have any Plugins Folder in FakeSMC (apparently I am using an older version)
in my case (GA-Z68X-UD3H-B3 with UEFI) I had to rollback AppleACPIPlatform.kext to 10.8.1.
Ok, works. But why?
Has anybody more knowledge why the 10.8.2 AppleACPIPlatform.kext breaks my system.

I have the same problem, decided to update yesterday because it seemed like a "walk through the park" for most people...
But not for us appearantly.

The reason why? I have read that FakeSMC is not compatible with the updated AppleACPIPlatform.kext.
Fix? Well, there are two:
1) Downgrade AppleACPIPlatform.kext to the 10.8.1 version (I get KP when doing so) <= see edit
2) Disable VT-d in your BIOS (works for me but I prefer it enabled though)

EDIT: I re-tried installing the old AppleACPIPlatform.kext last night (3am ), this time I used Pacifist,
took the kext from the 10.8.0 Mountain Lion App Store app, and let Pacifist install it,
then I fixed permissions and ran kext utility a couple of times, just to be sure.

VT-d is enabled now and everything seems to work fine.