7.1-RELEASE won't boot: run_interrupt_driven_hooks

[FuLLBLaSTstorm]

Dear List,
I tried to install FreeBSD 7.1-RELEASE amd64 on a brand new Fujitsu
Siemens laptop. It didn't even boot.
I keep getting messages like:

run_interrupt_driven_hooks: still waiting after 60 seconds for xpt_config
run_interrupt_driven_hooks: still waiting after 120 seconds for xpt_config

I tried booting with / without ACPI, but nothing helped. :(
Any ideas?