linux-kernel - Re: ACPI Error under 2.6.26-rc*

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Date:	Tue, 22 Jul 2008 10:22:39 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Andre Prendel <andre_prendel@....de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	kernel-testers@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Zhao, Yakui" <yakui.zhao@...el.com>
Subject: Re: ACPI Error under 2.6.26-rc*

On Thu, 2008-07-17 at 16:41 +0800, Andre Prendel wrote:
> On Tue, Jul 15, 2008 at 04:41:00PM +0800, Zhang Rui wrote:
> > > > It seems that OS failed to get the correct RSDT address
> > > (0x1fff0000),
> > > > although the RSDP is found correctly. (ACPI: RSDP 000FA340,
> 0014)
> > > >
> > > > please run "./acpidump --addr 0xFA340 --length 0x14 > rsdp_xxx",
> > > > and attach the rsdp for all of the three cases (good, ACPI
> Error,
> > > ACPI
> > > > Exception).
> > > Hello Rui,
> > >
> > > here is the output of the three cases. The dump files are attached
> > > too.
> > >
> > > ----
> > > good
> > > ----
> > > andre@...ntu:~/src/acpi/pmtools-20071116/acpidump$ hexdump
> rsdp_good
> > > 0000000 5352 2044 5450 2052 418c 494d 2020 0020
> > > 0000010 0000 1fff                            
> > > 0000014
> > >
> > > -----
> > > error
> > > -----
> > > andre@...ntu:~/src/acpi/pmtools-20071116/acpidump$ hexdump
> rsdp_error
> > > 0000000 5352 2044 5450 2052 418a 494d 2020 0020
> > > 0000010 0000 21ff                            
> > > 0000014
> > >
> > > ---------
> > > exception
> > > ---------
> > > andre@...ntu:~/src/acpi/pmtools-20071116/acpidump$ hexdump
> > > rsdp_exception
> > > 0000000 5352 2044 5450 2052 417c 494d 2020 0020
> > > 0000010 0000 2fff                            
> > > 0000014
> >
> > Weird.
> > The dmesg shows that the memory map gotten from e820 table is
> changed.
> > And the file attached shows that rsdp points to different rsdt
> address.
> > >
> > > Now I see the ACPI Error under the 2.6.25.10 kernel sometimes too,
> but
> > > power off works well. So I also attach the two configs. Maybe the
> > > different config is the reason why power off works under
> 2.6.25.10.
> > so you may get different e820 table when running 2.6.25.10 as well?
> > could you please attach the dmesg output of a 2.6.25.10 kernel which
> has
> > the ACPI error?
> 
> Attached. Yes, the e820 table differs, but power off still works.

Hmm, there seems to be two bugs here.
1. invalid e820 tables, which seems like a BIOS bug, please try to
upgrade your BIOS.
2. poweroff doesn't work.
   Hmm, please try boot option "acpi=off" in both 2.6.25 and 2.6.26.
   I guess power off works on 2.6.25 while it fails on 2.6.26, right?

thanks,
rui


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