Problems with an IBM Thankpad X40

[Rasmus Skaarup]

Hello,

I recently purchased a IBM Thinkpad X40, and installed FreeBSD 5.3-R
without any problems. After that I upgraded to 5.3-STABLE as of 16th of
November.

My problem is that the system freezes whenever I press a button (volume 
up, volume down, mute) or when I connect or disconnect the power.

If I disable ACPI the system freezes by itself, one minut after it comes 
up.

I tried to add:

hw.acpi.osname="Windows 2001"

to /boot/loader.conf - but no luck.

I also tried the new acpi stuff from Mark Santcroos
(acpi_import_20041105.diff) but still no difference.

The firmware is the latest from IBM (1.43) as of 10th of October.

"acpidump -d -t" can be found here:

http://skaarup.org/ibmx40.asl

"dmesg" can be found here:

http://skaarup.org/ibmx40.dmesg

Any help or input is greatly appreciated.

Best regards,
Rasmus Skaarup