Du hast übrigens schon einen "Leidenskollegen", auch wenn dieser einen etwas anderen Acer-Notebook-Typ einsetzt:
https://bugzilla.novell.com/show_bug.cgi?id=623393
"Bug 623393 - hard lock at boot with acpi on acer aspire 1310"

"I've a acer aspire 1310. After upgrade from openSUSE 11.2 to openSUSE 11.3 boot
hangs unless I'm using acpi=off or acpi=ht at a very early state. The last
messages I've got are:

[0.535729] ACPI: Core revision 20100121
[0.532496] ACPI: setting ELCR to 0200 (from 0e20)
...
[0.564360] ACPI: but type pci registered
[0.716290] PCI: Using configuration type 1 for base access
[0.716566] mtrr: your CPUs had inconsistent fixed MTRR settings
[0.716665] mtrr: propably your BIOS does not setup all CPUs.
[0.716762] mtrr: corrected configuration.
[0.720655] bio: create slab at 0
[0.722712] ACPI: EC: Loop up EC in DSDT

After that it hangs with fan at maximum speed, no keyboard reaction e.g. on
Caps-Lock or CTRL-ALT-DEL or Sys-Rq. Only power off after 4s works.

With acpi=ht or acpi=off, it without power management, battery control, even
power off after halt, I cannot use it.

I've also tried acpi.debug_level=0xf in hope to get some more information, but
nothing changed.

I've also tried out kernel desktop or rt instead of default but it still hangs.
Currently I've reinstalled kernel 2.6.31.12-0.2-default from openSUSE 11.2,
which works fine with acpi.

BTW: Producing the attached acpi dump, acpidump reported: "Wrong checksum for
DSDT!"

The bios is the newest version from acer.

Reproducible: Always

Steps to Reproduce:
1. upgrade from openSUSE 11.2 to openSUSE 11.3
2. remove "quiet" from kernel parameters at grub/menu.lst
3. reboot
Actual Results:
hang

Expected Results:
boot"