ThinkPad R40 hangs during ACPI power down

[Don Lewis]

On 26 Sep, To: nate at root.org wrote:
> On 25 Sep, Nate Lawson wrote:

>> To debug this, please boot a newer kernel with the ACPI_DEBUG option with
>> the following options in loader.conf:
>> 
>>     debug.acpi.layer="ACPI_ALL_COMPONENTS ACPI_ALL_DRIVERS"
>>     debug.acpi.level="ACPI_LV_FUNCTIONS"
>> 
>> You'll get spammed with way too many messages on boot but just ignore
>> these.
> 
> You're not kidding.  I gave up after 2 hours and 7.5 MB of output.  It
> looks like it's looping, see below ...

I let it run overnight and it spewed 25 MB of output before I killed it.
It didn't get very far into the boot, just after the CPU is probed.  I
uploaded the full trace to
<http://people.freebsd.org/~truckman/r40-acpi-trace.bz2>.

The system boots ok if I remove these two debug options.