Hi!
> > So if you compile a kernel, then reboot, boot will hang after "Freeing SMP
> > alternatives memory" (and then wastes power, making thermal situation even
> > worse).
>
> Normally, next message is "smpboot: CPU0: Genuine Intel...".
>
> I added some printks, and check_bugs() returns. Then it goes to ACPI and never
> comes back...
>
> kernel-parameters.txt points to Documentation/acpi/debug.txt, but that one
> does not exist.
>
> Any ideas what debugging parameters to use for ACPI? I either get nothing or
> so much that machine does not boot...
I ended up adding printks...
It hangs in acpi_hw_set_mode().
ACPI enable: set mode: acpi
ACPI: hw_set_mode
ACPI: hw_set_mode mode switch
ACPI: write_port?
ACPI: os write port
we write to the port but that never returns.
I assume SMM is doing its magic at that point. Any ideas how to debug it
further?
Is it possible that it is some kind of screaming interrupt?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
