ACPI

https://bugzilla.kernel.org/show_bug.cgi?id=24002





--- Comment #20 from Zhang Rui <rui.zhang@...>  2011-04-07 01:46:43 ---
please run "cat /proc/acpi/battery/BAT1/state" instead this time and I guess
there will be a lot of messages in the dmesg output.

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--- Comment #21 from deBK <debk@...>  2011-04-07 15:09:46 ---
Created an attachment (id=53772)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=53772)
dmesg after "cat /proc/acpi/battery/BAT1/state"

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--- Comment #22 from Zhang Rui <rui.zhang@...>  2011-04-11 08:53:06 ---
weird, I still didn't get any useful debug output.
would you please run
1. echo 0xffffffff > /sys/module/acpi/parameters/debug_layer
2. echo 0xffffffff > /sys/module/acpi/parameters/debug_layer
3. cat /proc/acpi/battery/BAT1/state
and then attach the dmesg output?

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--- Comment #23 from deBK <debk@...>  2011-04-13 17:04:51 ---
Created an attachment (id=54272)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=54272)
dmesg

I guessed that you meant to set the debug_level with the second echo, not set
the debug_layer twice.  I hope this was ok--it produced quite the pile of
kernel messages.

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--- Comment #24 from Zhang Rui <rui.zhang@...>  2011-04-14 01:43:03 ---
Created an attachment (id=54342)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=54342)
ec debug patch

please apply this patch, and attach the dmesg output after redoing the test.

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--- Comment #25 from deBK <debk@...>  2011-04-14 19:50:57 ---
Created an attachment (id=54382)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=54382)
dmesg

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Zhang Rui <rui.zhang@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #54382|application/octet-stream    |text/plain
          mime type|                            |




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--- Comment #26 from deBK <debk@...>  2011-04-25 18:06:55 ---
I upgraded to OpenSuse-11.4.  The installer booted a stripped down version of
the 2.6.37 kernel.  With this kernel, I get what appears to be correct data
from /proc/acpi/battery/BAT1/info and state.  This suggests that the ec and
battery modules are fine but that something else in the kernel is preventing
access to the battery device.

Unfortunately I don't know how to strip down the standard kernel to produce the
kernel opensuse uses for installs.  I'll see if I can get that.

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--- Comment #27 from deBK <debk@...>  2011-04-26 21:27:03 ---
A solution is to disable ACPI_WMI in the kernel config.  This makes the battery
status available and stops the error messages to dmesg.  If you want to test a
patch that disables WMI if it is broken then I'm happy to do so.  Otherwise,
thanks for your help.

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Zhang Rui <rui.zhang@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mjg59-kernel@...




--- Comment #28 from Zhang Rui <rui.zhang@...>  2011-04-27 06:44:38 ---
Matthew,
have you ever seen such kind of problems that acpi wmi driver breaks ACPI EC?

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Travis Jones <travisejones@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |travisejones@...




--- Comment #29 from Matthew Garrett <mjg59-kernel@...>  2011-04-27 11:36:07 ---
Nope. The WMI code should do very little unless one of the hardware-specific
WMI drivers loads. Is that happening here?

--- Comment #30 from deBK <debk@...>  2011-04-27 14:20:12 ---
The motherboard provides a hotkey that Vista uses to cycle between 5 power
management modes.  The comments in msi-wmi.c say the module handles the
hotkeys, but not this one.  I have no idea about any of this, but it seems a
reasonable place to start looking for the problem.  Also, a linux forum posting
has unearthed another user with this motherboard and the same problem.

--- Comment #31 from Travis Jones <travisejones@...>  2011-06-22 05:41:08 ---
I can verify that excluding MSI in the kernel configuration allows the battery
information to be seen.  I see no hardware-specific WMI modules loaded when WMI
is built-in.

Would it be possible to add a kernel boot parameter similar to acpi=off to
allow a user to turn off WMI on flaky hardware with out compiling the entire
kernel?  For this particular laptop motherboard, MS-171F, no functionality is
missing without it.  All the buttons work, even the hot key mentioned in
comment #30 (labeled P1) generates the character "±" on the command line and in
other applications.

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--- Comment #32 from Zhang Rui <rui.zhang@...>  2012-01-18 02:26:26 ---
It's great that kernel bugzilla is back.

can you please verify if the problem still exists in the latest upstream
kernel?

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--- Comment #33 from deBK <debk@...>  2012-03-24 13:47:55 ---
Problem still exists with 3.1.0

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Alan <alan@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED
                 CC|                            |alan@...
     Kernel Version|2.6.36                      |3.1.0




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Lan Tianyu <tianyu.lan@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tianyu.lan@...
         AssignedTo|rui.zhang@...         |tianyu.lan@...




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--- Comment #34 from Lan Tianyu <tianyu.lan@...>  2013-04-15 14:06:14 ---
Created an attachment (id=98781)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=98781)
patch

Please try this patch.

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Lan Tianyu <tianyu.lan@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEEDINFO




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--- Comment #35 from Lan Tianyu <tianyu.lan@...>  2013-04-22 03:21:13 ---
ping ...

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--- Comment #36 from deBK <debk@...>  2013-04-22 10:47:02 ---
I no longer have motherboard.  Suggest pinging fellow who provided comment #31.

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--- Comment #37 from Lan Tianyu <tianyu.lan@...>  2013-04-22 11:17:31 ---
Ok. Thanks for reply.

Hi Jones:
        Could you test the patch in the comment #34?

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--- Comment #38 from Lan Tianyu <tianyu.lan@...>  2013-05-05 13:08:43 ---
Anyone can test the patch in the Comment #34 ? From my opinions, this problem
is caused by wmi driver's EC operation region handler doesn't support
read/write operation of longer than 8 bit data and return bad param error.

 Device (SCM0)
        {
          Name (_HID, "pnp0c14")
          Name (_UID, Zero)
          ...
          OperationRegion (EC, EmbeddedControl, Zero, 0x0100)
                            Field (EC, ByteAcc, NoLock, Preserve)
                            {
                                        Offset (0x2D),
                                T2D0,   1,
                                T2D1,   4,
                                T2D5,   3,
                                TD2E,   8,
                                TD2F,   8,
                                TD30,   8,
                                TD31,   8,
                                TD32,   8,
                                TD33,   8,
                                        Offset (0x35),
                                TD35,   8,
                                TD36,   8,
                                        Offset (0x38),
                                TD38,   16,
                                TD3A,   16,

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--- Comment #39 from Travis Jones <travisejones@...>  2013-05-11 16:59:28 ---
Sorry for not replying earlier.  I no longer regularly check the email account
I used to register an account here.

I cannot recall if the problem went away for me upon upgrading to Ubuntu 11.10
(based on kernel version 3.0.4) or 12.04 (based on kernel version 3.2.14), but
I no longer need to recompile the kernel to have access to the battery
information.  Since deBK still had the problem with kernel version 3.1, I
suppose the problem went away with 12.04.  I am currently running 12.04.2,
which is based on kernel version 3.5.7.2, and still have no problems.

Did you introduce a patch that was incorporated into the mainline kernel by
version 3.2.14?

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--- Comment #40 from Lan Tianyu <tianyu.lan@...>  2013-05-13 00:55:27 ---
Hi Jones:
         Thanks for response. Please check whether the issue take place with
CONFIG_ACPI_WMI in the v3.9. If it still existed, try my patch in the Comment
#34.

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--- Comment #41 from Lan Tianyu <tianyu.lan@...>  2013-05-20 01:04:42 ---
Hi Jones:
         Any update?

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