Re: ACPI S3 resume only reboots

[Alberto <albeclemit-whZMOeQn8C0@public.gmane.org>]

> On Sat, Oct 09, 2004 at 03:06:28PM +0200, Pavel Machek wrote:
> > > How could i try to debug this to give you more info?
> > 
> > You basically need to fix this yourself. Add infinite loops to
> > wakeup.S to see where it breaks.
> > 								Pavel

I isolated the line were it breaks and reboots.

Code from arch/i386/kernel/acpi/wakeup.S

[...] 
	# setup data segment
	movw	%cs, %ax
	movw	%ax, %ds					# Make ds:0 point to wakeup_start
	movw	%ax, %ss
	mov	$(wakeup_stack - wakeup_code), %sp		# Private stack is needed for ASUS board
	movw	$0x0e00 + 'S', %fs:(0x12)

	pushl	$0		###THIS LINE CAUSES REBOOT###			# Kill any dangerous flags
	popfl

	movl	real_magic - wakeup_code, %eax
	cmpl	$0x12345678, %eax
	jne	bogus_real_magic
[...]

placing a statement like
hole:	jmp hole
before pushl $0 (line 37) makes it loop, while immediatly after it reboots.

I don't have skills to fix it myself, but i can test patches... how can i help?

Thanks,
Alberto Piai


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