linux-kernel - Re: 3.9-rc3+: reports battery as 0 mWh capacity on thinkpad x60

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Date:	Sat, 23 Mar 2013 14:00:23 +0100
From:	Bjørn Mork <bjorn@...k.no>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Pavel Machek <pavel@....cz>,
	kernel list <linux-kernel@...r.kernel.org>, lenb@...nel.org,
	linux-acpi@...r.kernel.org
Subject: Re: 3.9-rc3+: reports battery as 0 mWh capacity on thinkpad x60

"Rafael J. Wysocki" <rjw@...k.pl> writes:
> On Saturday, March 23, 2013 12:40:12 PM Pavel Machek wrote:
>> Hi!
>> 
>> pavel@amd:~$ cat /proc/acpi/battery/BAT0/info 
>> present:                 yes
>> design capacity:         0 mWh
>> last full capacity:      0 mWh
>> battery technology:      rechargeable
>> design voltage:          14400 mV
>> 
>> This worked before... at least it works in 2.6 kernel used by debian.
>
> This works for me in 3.9-rc3.  May I see your .config?

Well, if this works, then maybe the Kconfig help text should be updated:

config ACPI_PROCFS_POWER
        bool "Deprecated power /proc/acpi directories"
        depends on PROC_FS
        help
          For backwards compatibility, this option allows
          deprecated power /proc/acpi/ directories to exist, even when
          they have been replaced by functions in /sys.
          The deprecated directories (and their replacements) include:
          /proc/acpi/battery/* (/sys/class/power_supply/*)
          /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
          This option has no effect on /proc/acpi/ directories
          and functions, which do not yet exist in /sys
          This option, together with the proc directories, will be
          deleted in 2.6.39.


Time to call the bluff now :)


Bjørn
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