5.2.1-p8 -> -CURRENT: Fatal trap 12

[Drew Broadley]

Jon Noack wrote:

> I'm trying to update a machine from 5.2.1-p8 to -CURRENT.  I did a 
> buildworld, buildkernel, installkernel, and was trying to reboot into 
> single-user mode when the I got the following and was dropped to ddb:


I just suffered the EXACT same problem.

Solution:

    Boot with ACPI disabled, you will boot without a problem.

    Remove in your /boot/loader.conf any reference to loading a 3rd 
party ACPI DSDT table and then reboot.

Problem is in using non bios ACPI DSDT tables.

Can someone look into this ?

- Drew