From: Andrey Borzenkov <arvidjaar@mail.ru>
To: linux-acpi@vger.kernel.org
Subject: [2.624-rc1 regression] lost battery information
Date: Fri, 26 Oct 2007 20:24:05 +0400
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I have lost battery in 2.6.24-rc1. Without CONFIG_ACPI_PROCFS I have=20
no /proc/acpi/battery and cannot test netlink interface because right now=20
there is no consumer of this.

With CONFIG_ACPI_PROCFS I get

{pts/1}% LC_ALL=3DC ll /proc/acpi/battery/BAT1
total 0
=2Drw-r--r-- 1 root root 0 Oct 26 20:18 alarm
=2Dr--r--r-- 1 root root 0 Oct 26 20:18 info
=2Dr--r--r-- 1 root root 0 Oct 26 20:18 state
{pts/1}% LC_ALL=3DC  cat /proc/acpi/battery/BAT1/*
cat: /proc/acpi/battery/BAT1/alarm: Bad address
cat: /proc/acpi/battery/BAT1/info: Bad address
cat: /proc/acpi/battery/BAT1/state: Bad address
{pts/1}% LC_ALL=3DC ll /proc/acpi/battery/BAT2
total 0
=2Drw-r--r-- 1 root root 0 Oct 26 20:18 alarm
=2Dr--r--r-- 1 root root 0 Oct 26 20:18 info
=2Dr--r--r-- 1 root root 0 Oct 26 20:18 state
{pts/1}% LC_ALL=3DC cat /proc/acpi/battery/BAT2/*
present:                 no
present:                 no
present:                 no

BAT2 is correct - it is not present. BAT1 is lying. There is nothing in dme=
sg.=20
battery is loaded (obviously)

ACPI related stuff from dmesg:

{pts/1}% dmesg |grep ACPI
[    0.000000]  BIOS-e820: 00000000000eee00 - 00000000000ef000 (ACPI NVS)
[    0.000000]  BIOS-e820: 000000001ef60000 - 000000001ef70000 (ACPI data)
[    0.000000] ACPI: RSDP 000F0090, 0014 (r0 TOSHIB)
[    0.000000] ACPI: RSDT 1EF60000, 0028 (r1 TOSHIB 750        970814 TASM =
=20
4010000)
[    0.000000] ACPI: FACP 1EF60054, 0084 (r2 TOSHIB 750        970814 TASM =
=20
4010000)
[    0.000000] ACPI: DSDT 1EF600D8, 68DA (r1 TOSHIB 4000     20020417 MSFT =
=20
100000A)
[    0.000000] ACPI: FACS 000EEE00, 0040
[    0.000000] ACPI: PM-Timer IO Port: 0xee08
[  896.112009] ACPI: Core revision 20070126
[  896.112775] ACPI: Looking for DSDT in initramfs... error, file /DSDT.aml=
=20
not found.
[  896.123590]  tbxface-0598 [00] tb_load_namespace     : ACPI Tables=20
successfully acquired
[  896.123631] ACPI: setting ELCR to 0200 (from 0a00)
[  896.124208] evxfevnt-0091 [00] enable                : Transition to ACP=
I=20
mode successful
[  896.131744] ACPI: bus type pci registered
[  896.149165] ACPI: EC: Look up EC in DSDT
[  896.163343] ACPI: Interpreter enabled
[  896.163362] ACPI: (supports S0 S3 S4 S5)
[  896.163510] ACPI: Using PIC for interrupt routing
[  896.195892] ACPI: PCI Root Bridge [PCI0] (0000:00)
[  896.197650] PCI quirk: region ee00-ee3f claimed by ali7101 ACPI
[  896.200015] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
[  896.200588] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
[  896.227797] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11)
[  896.228562] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 10 *11)
[  896.229271] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 10 *11)
[  896.230101] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 *11)
[  896.230818] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 *11)
[  896.231527] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 *11)
[  896.232912] ACPI: Power Resource [PFAN] (off)
[  896.233622] pnp: PnP ACPI init
[  896.233766] ACPI: bus type pnp registered
[  896.257679] pnp: PnP ACPI: found 12 devices
[  896.257737] ACPI: ACPI bus type pnp unregistered
[  896.258820] PCI: Using ACPI for IRQ routing
[  896.325763] ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
[  896.325805] ACPI: PCI Interrupt 0000:00:10.0[A] -> Link [LNKC] -> GSI 11=
=20
(level, low) -> IRQ 11
[  896.327116] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
[  896.327143] ACPI: PCI Interrupt 0000:00:11.0[A] -> Link [LNKA] -> GSI 11=
=20
(level, low) -> IRQ 11
[  896.328392] ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11
[  896.328416] ACPI: PCI Interrupt 0000:00:11.1[B] -> Link [LNKB] -> GSI 11=
=20
(level, low) -> IRQ 11
[  896.978962] ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
[  896.980097] ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKD] -> GSI 11=
=20
(level, low) -> IRQ 11
[  902.378588] ACPI: Unable to derive IRQ for device 0000:00:04.0
[  902.406719] ACPI: PCI Interrupt 0000:00:04.0[A]: no GSI
[  919.051426] ACPI: PCI Interrupt Link [LNKG] enabled at IRQ 11
[  919.051451] ACPI: PCI Interrupt 0000:00:02.0[A] -> Link [LNKG] -> GSI 11=
=20
(level, low) -> IRQ 11
[  920.132284] ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 11
[  920.132307] ACPI: PCI Interrupt 0000:00:06.0[A] -> Link [LNKH] -> GSI 11=
=20
(level, low) -> IRQ 11
[  927.120073] ACPI: AC Adapter [ADP1] (on-line)
[  927.195942] ACPI: Battery Slot [BAT1] (battery present)
[  927.200475] ACPI: Battery Slot [BAT2] (battery absent)
[  927.277564] ACPI: Power Button (FF) [PWRF]
[  927.290786] ACPI: Lid Switch [LID]
[  927.324850] ACPI: Transitioning device [FAN] to D3
[  927.324867] ACPI: Transitioning device [FAN] to D3
[  927.324891] ACPI: Fan [FAN] (off)
[  927.535960] ACPI: CPU0 (power states: C1[C1] C2[C2])
[  927.638487] ACPI: Thermal Zone [THRM] (55 C)
[  927.770100] toshiba_acpi: Toshiba Laptop ACPI Extras version 0.18
[  927.920519] ACPI: Video Device [VGA] (multi-head: yes  rom: yes  post: n=
o)
[ 1055.552624] ACPI: PCI interrupt for device 0000:00:0a.0 disabled
[ 1055.554812] ACPI: PCI interrupt for device 0000:00:06.0 disabled
[ 1055.555479] ACPI: PCI interrupt for device 0000:00:02.0 disabled
[    0.901020] ACPI: PCI Interrupt 0000:00:02.0[A] -> Link [LNKG] -> GSI 11=
=20
(level, low) -> IRQ 11
[    0.901271] ACPI: Unable to derive IRQ for device 0000:00:04.0
[    0.901278] ACPI: PCI Interrupt 0000:00:04.0[A]: no GSI
[    0.904594] ACPI: PCI Interrupt 0000:00:06.0[A] -> Link [LNKH] -> GSI 11=
=20
(level, low) -> IRQ 11


As for the case without ACPI_PROCFS ... well, I do not have it in /proc -=20
which is expected - but neither I do have it in /sys. And Kconfig help reads

          The deprecated files (and their replacements) include:

          /proc/acpi/sleep (/sys/power/state)
          /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
          /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
          /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
          /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
          /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)

neither does it mention /proc/acpi/battery not do I actually have any batte=
ry=20
information in /sys.

Personally I do not like it (if it is intentional). Leaving only netlink=20
interface means user has no way to query for actual state. We need somethin=
g=20
running all the time and hope, it never loses any event and thus reflects=20
actual state. But it also means we are not allowed to restart it (whatever =
it=20
is) as it will have no way to query for actual state on restart ...

=2Dandrey

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