How can I _really_ disable ACPI?

One morning I found my MacBook frozen and with fans spinning noisy. It refused to boot anymore, even off the install DVD. I started in target disk mode and checked the disk, which was fine. The Apple Hardware Test also ran without complaints, although I've already been supposing a grilled CPU.
However a Knoppix Live DVD surprisingly started with the noacpi flag enabled. Linux loaded and ran perfectly. Since then I've been trying to achieve the same result with XNU boot flags but without success.
The current situation is:
- I moved all but the essential kexts out of the Extensions folder, keeping only these:
AppleAPIC.kext
AppleFileSystemDriver.kext
AppleRTC.kext
AppleSMBIOS.kext
IOACPIFamily.kext
IOATAFamily.kext
IOHIDFamily.kext
IOPCIFamily.kext
IOSCSIArchitectureModelFamily.kext
IOStorageFamily.kext
IOUSBFamily.kext
IOUSBMassStorageClass.kext
System.kext
- com.apple.Boot.plist contains these flags: -v cpus=1 acpi=off
and the kernel hangs early on load with the last couple of messages being:
ACPI: System State [ ...
mbinit: done ...
rooting via boot-uuid from /chosen: ...
Waiting on <dict ID="0"><key>IOProviderClass ...
- when I omit either the cpus or the acpi flag, the kernel stops loading after the ACPI line and sometimes I get a kernel panic stating (among many lines of text): processor registers corrupt
So, my questions are:
1. Which parameters and/or kexts should I pass to the XNU kernel in order to achieve the same behaviour like Linux - loading with ACPI disabled (or loading at all)?
2. How could I track down the problem?
3. If the thermal sensor or something else on the CPU (Intel Core 2 Duo) is being burned out, is there a tool to test this, i.e. can I tell that there will be no data corruption when I install and use Linux on the MacBook?
Thanks in advance!
Erik

dfgfgre wrote:
It is funny that the XNU kernel loads it extensions based on a mysterious logic that nobody knows of or can control ... it has a touch of black magic
There is no mysterious logic about it. The process is well explained in the previously mentioned System Startup Programming Topic & related links, expecially I/O Kit Fundamentals: Introduction to I/O Kit Fundamentals.
What is mysterious is your explanation about what will or won't prevent the kernel & extensions to it from loading, which makes no sense in light of the material in these references. And while instances of needing to disconnect the HD to get a system to boot from another source are quite possible, there is no reason to think that "a really really bad directory" is the cause, whatever that mysterious phrase is supposed to mean.
Think about it: a directory is a feature of a file system. At boot time, no method of accessing any file system exists in the computer. The bootROM (which is in firmware) starts the process by first doing POST, which initializes some of the hardware, & then selects the operating system to run. If there is a partition on some device previously set for that in PRAM (for instance, by using the Startup Disk System Preference), it will choose that one unless one of two exceptions occur: 1) the user overrides that by invoking the Startup Manager (also in firmware) or 2) the chosen device isn't available for some reason, in which case the firmware starts looking for the first available device with a boot loader. In either of these two exceptions, it is certainly possible that a bad boot loader from the device would halt the boot process, but if the user takes control of the choice by evoking the Startup Manager, unless there is a hardware problem in the computer itself, this is a non-issue, assuming a viable boot loader is chosen.
Only after the boot loader loads the kernel environment from the device (which for OS X among other things means building the I/O device tree) can that kernel provide the low level services necessary to access the file systems it supports.
If you want to take control of the boot process, you can -- but you must be familiar with all of the requirements involved, including those mentioned in the previously mentioned references, the EFI boot process, & so on. But in no case will this exempt you from the problems "buggy" hardware will cause. There is nothing whatsoever mysterious about that.

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