Re: ACPI S3 resume only reboots

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

On Fri, 15 Oct 2004 06:52:57 -0700
"Pallipadi, Venkatesh" <venkatesh.pallipadi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:

> >> > From the comment in those lines, push and pop are not 
> >required for all
> >> > platforms. Can you just comment out that push and pop and 
> >see how far
> >> > you can go.
> >
> >I know it's not the most the effective way to proceed, but at 
> >least i tryed ;)
> >I've been moving around the pushl $0 (that causes reboot) to 
> >check if the code was still executing. That's what i found.

> >	testl	$1, video_flags - wakeup_code
> >		### If I put pushl $0 here, it causes reboot. 
> >code is still alive.
> > 	jz	1f
> >		## pushl $0 here doesn't make reboot (hang on wakeup)
> >	
> >	lcall   $0xc000,$3

> Jz is jump on zero. The instructions following jz here never gets
> executed unless you pass "acpi_sleep=s3_bios". You have to follow the
> code to where 1: is. 

I followed the code until the line that makes it hang:
[...]
wakeup_pmode_return:
	movw	$__KERNEL_DS, %ax
	movw	%ax, %ss			# THIS LINE MAKES IT HANG
	movw	%ax, %ds
	movw	%ax, %es
	movw	%ax, %fs
	movw	%ax, %gs
	movw	$0x0e00 + 'u', 0xb8016

	# reload the gdt, as we need the full 32 bit address
	lgdt	saved_gdt
	lidt	saved_idt
	lldt	saved_ldt
[...]

...what's happening now?
Thanks,
Alberto



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