More info on VP6 panics

Ian Pilcher
2004-01-17T06:50:53Z

Background: I get a kernel panic when I boot 2.4.2{2,3,4} with ACPI on
my dual-processor Abit VP6. Compiling the kernel with CONFIG_DEBUG_SLAB
turned on allows it to boot, as does booting with "idle=poll".

I do not believe that the panic occurs anywhere in the ACPI code. From
what I can tell, the transition to ACPI mode causes the idle thread on
the other processor to panic.

I believe that I have identified the line of code that triggers the
panic. It is the actual transition to ACPI mode at
drivers/acpi/hardware/hwacpi.c, line 143. If I insert an infinite loop
before the call to acpi_os_write_port, the boot process simply hangs.
If I move the loop below the call to acpi_os_write_port, I get the same
old panic message.

How can I debug this further?

Thanks!
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Ian Pilcher i.pilcher-Wuw85uim5zDR7s880joybQ@public.gmane.org
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