PII SMP system hangs during boot with ACPI enabled

John Polstra jdp at polstra.com
Mon Nov 24 14:14:01 PST 2003

On 24-Nov-2003 Nate Lawson wrote:
> On Mon, 24 Nov 2003, John Polstra wrote:
>> On 24-Nov-2003 Nate Lawson wrote:
>> >
>> > Please also send the output of acpidump -t -d > jdp-P2.asl
>> When I try to run that command, I get:
>>   acpidump: sysctl machdep.acpi_root does not point to RSDP
>> The sysctl command shows that machdep.acpi_root is 0.
>> Remember, though, in order to boot it I had to disable ACPI in
>> /boot/loader.conf.
> Yes, I see.  You could use an older kernel like the 5.1R cd.

I'll try that, and send you the dump if I can get one.

> Both of these show that acpi_task_thread is calling a task and then
> AcpiOsSignalSemaphore is hanging.  I'm wondering if your system can't
> handle the acpi interrupt being moved to irq 20.  Please try this
> (untested) patch that should disable moving the SCI to irq 20.  jhb can
> probably address this better than I.

I tried your patch, but it didn't change the behavior any.


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