Re: Trying to make headway into finding the Xid crashes source...
You may want to try APIC instead of ACPI. One stand for advanced programable interrupt controller the other for advanced configuration and power interface IIRC. There are a few kernel parameters related to apic (in particular nolapic). Have a look at Documentation/kernel-parameters.txt wherever that's on your system. (for fc3 it's in below /usr/share/doc/kernel-doc-xx/ for fc2 it used to be below /usr/src/linux-xx/).
rant: Why in the world did they got rid of kernel-sources in fc3, I'm having a heck of a time getting the kernel to compile using the source package. Similarly, with agpgart being built in: I have machines that don't ever start X, I have no need for agp or framebuffers on them. fc is getting bloated.