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    SubjectRe: ACPI Error under 2.6.26-rc*
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    Date
    On Tue, 2008-07-22 at 16:01 +0800, Andre Prendel wrote:
    > On Tue, Jul 22, 2008 at 10:22:39AM +0800, Zhang Rui wrote:
    > > 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@ubuntu:~/src/acpi/pmtools-20071116/acpidump$ hexdump
    > > > rsdp_good
    > > > > > 0000000 5352 2044 5450 2052 418c 494d 2020 0020
    > > > > > 0000010 0000 1fff
    > > > > > 0000014
    > > > > >
    > > > > > -----
    > > > > > error
    > > > > > -----
    > > > > > andre@ubuntu:~/src/acpi/pmtools-20071116/acpidump$ hexdump
    > > > rsdp_error
    > > > > > 0000000 5352 2044 5450 2052 418a 494d 2020 0020
    > > > > > 0000010 0000 21ff
    > > > > > 0000014
    > > > > >
    > > > > > ---------
    > > > > > exception
    > > > > > ---------
    > > > > > andre@ubuntu:~/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?
    >
    > Hello Rui,
    >
    > I have found the power off problem. After bisecting the problem
    > without
    > success I compared the configs from 2.6.25.10 and 2.6.26-rc*. I have
    > seen a difference in the APM section. In the 2.6.26-rc* config
    > CONFIG_APM_DO_ENABLE was not enabled.
    hah, this explains why power off doesn't work in 2.6.26 when ACPI is
    disabled.

    > I dont know how this could happen. AFAIR
    > I used the working 2.6.25 config and made just a "make oldconfig". So
    > I have
    > enabled CONFIG_APM_DO_ENABLE, build the kernel and now power off works
    > fine. Further the ACPI errors/exceptions do not appear with 2.6.26
    > (stable)
    > and the new config. Maybe this is why CONFIG_APM_DO_ENABLE is enabled.
    > I dont
    > know the relation between this option and ACPI.
    >
    > -----------------------
    > dmesg (extract)
    > -----------------------
    > Linux version 2.6.26-default (andre@ubuntu) (gcc version 4.1.3
    > 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)) #13 Mon Jul 21
    > 22:48:01 CEST 2008
    > BIOS-provided physical RAM map:
    > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
    > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    > BIOS-e820: 0000000000100000 - 000000001fff0000 (usable)
    > BIOS-e820: 000000002fff0000 - 000000002fff8000 (ACPI data)
    > BIOS-e820: 000000002fff8000 - 0000000030000000 (ACPI NVS)
    > BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
    > BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
    > BIOS-e820: 00000000ffee0000 - 00000000fff00000 (reserved)
    > BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
    > [...]
    > ACPI: Interpreter disabled.
    > Linux Plug and Play Support v0.97 (c) Adam Belay
    > pnp: PnP ACPI: disabled
    > [...]
    >
    > The bios problem still exists so maybe I will do an upgrade.
    >
    agree.
    so there is no problem in the upstream kernel. :)

    thanks,
    rui


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