DSDT Breaks Ethernet

I have 3 Gigabyte H67N-USB3-B3 motherboards and all running MT Lion. When I first boot up from a clean install I noticed I have what appears to be native ethernet that works really well. As soon as I use the DSDT for this MB from the database ethernet breaks and I have to install a driver from MultiBeast. As I recall it was the same with Lion. It seems to me it has that same behavior on my Gigabyte Z68MX-UD2H also.
Ethernet works fine upon initial install then MB with DSDT breaks it.

Does anyone know why this happens?

Do you mean that it works fine upon booting from unibeast, and not from your OS X partition? Have you installed Lnx2Mac's Realtek ethernet driver from multibeast?

sjvintage said:

Do you mean that it works fine upon booting from unibeast, and not from your OS X partition? Have you installed Lnx2Mac's Realtek ethernet driver from multibeast?

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I mean that when I first boot OSX 10.8 without a DSDT or any other Multibeast edits or kexts ethernet works fine. As soon as I apply any of the audio kexts and a user DSDT then I have to use Lnx2Mac's Realtek ethernet driver from Multibeast or the Realtek driver from the same. If I don't ever use the DSDT for the H67N-USB3 motherboard then I don't need any of the Multibeast ethernet drivers. Ethernet just works OOB.

When you first boot 10.8 without anything, you are probably booting using the unibeast USB. That contains all the necessary kexts to allow for the Ethernet to work. If you boot into verbose mode, you'll see the references to the Realtek driver even while booting from the unibeast USB.

sjvintage said:

When you first boot 10.8 without anything, you are probably booting using the unibeast USB. That contains all the necessary kexts to allow for the Ethernet to work. If you boot into verbose mode, you'll see the references to the Realtek driver even while booting from the unibeast USB.

Click to expand...

No, I am booting after chimera is installed without anything else just to test this out. As long as I don't use the DSDT, the on board ethernet works without any of the Multibeast ethernet kexts.

Ah. Interesting indeed. I have never encountered something like that. AFAIK, the realtek LAN has always needed an appropriate kext to work. Maybe more experimentation is due!