After rebooting with the DSDT.aml, are you still experiencing difficulties with ioreg? If so, then something's hosed with your ACPI tables, or your ioreg structure. Like I said, I haven't heard of this problem, so it makes me think that you should look into fixing it, so you can have a stable OS X system.

A good place to start is to google for ioreg outputs for the Mac most closely matching your specs (wikipedia has specs on the various mac models). Then do the same for your motherboard. Compare the three (obligatory B5 quote: understanding is a three--edged sword) files and note the differences.

Also, the guys who are doing amazing DSDT work (Master Chief, mm67, others) are using a GB EP45-DS3L, so some of their work should apply.

---

--
MacBook Pro - have allergy to nickel in the aluminum casing. So my kid gets an expensive toy!

Gateway MX 8738 - Retail, vanilla Snow Leopard 10.6.2 (thanks kizwan!) with Chameleon RC4, modified DSDT. Upgraded to Core 2 CPU (easy to do). Upgraded to 640GB drive. Everything but SD card working. Minor niggles. GMA950 with QE/CI and *no* artifacts.

iMac (luxo/lamp) G4 with Tiger.