Discussion about powersave development and porting to other distributions ()

Michael Eyrich | 3 Mar 2008 22:24

kpowersave reporting too many batteries


Hi,
kpowersave reports two batteries (Total, Battery 1, Battery 
2) if there is one in the system (IBM Thinkpad R52) and 
four, if there are two of them in the system. Is there a 
reason for it (e.g. compatibility interfaces)?

The acpi-tree reports only a single one battery.
gluck eyrich 165 (/proc/acpi): find battery/
battery/
battery/BAT0
battery/BAT0/alarm
battery/BAT0/state
battery/BAT0/info

Best, 
Michael

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Michael Eyrich, eyrich@...

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Stefan Seyfried | 4 Mar 2008 10:25

Re: kpowersave reporting too many batteries

Michael Eyrich wrote:
> Hi,
> kpowersave reports two batteries (Total, Battery 1, Battery 
> 2) if there is one in the system (IBM Thinkpad R52) and 
> four, if there are two of them in the system. Is there a 
> reason for it (e.g. compatibility interfaces)?

That's the reason: Newer kernels now have a battery interface in both
/proc/acpi (obsolete) and in /sysfs and old HAL cannot handle that. This is
not really a kpowersave issue.
At least that's how i understood the problem back when it happened to me. HAL
should be fixed in the mean time, so you could try updating your packages to
the latest versions and complain to your distribution's bugzilla if they still
have that problem.

If i am wrong with my explanation, i'm sure that Danny will correct me 

Have fun,

	Stefan
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Stefan Seyfried
R&D Team Mobile Devices            |              "Any ideas, John?"
SUSE LINUX Products GmbH, Nürnberg | "Well, surrounding them's out."

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Danny Kukawka | 4 Mar 2008 11:05

Re: kpowersave reporting too many batteries

On Dienstag, 4. März 2008, Stefan Seyfried wrote:
> Michael Eyrich wrote:
> > Hi,
> > kpowersave reports two batteries (Total, Battery 1, Battery
> > 2) if there is one in the system (IBM Thinkpad R52) and
> > four, if there are two of them in the system. Is there a
> > reason for it (e.g. compatibility interfaces)?
>
> That's the reason: Newer kernels now have a battery interface in both
> /proc/acpi (obsolete) and in /sysfs and old HAL cannot handle that. This is
> not really a kpowersave issue.
> At least that's how i understood the problem back when it happened to me.
> HAL should be fixed in the mean time, so you could try updating your
> packages to the latest versions and complain to your distribution's
> bugzilla if they still have that problem.

I've already fixed in git master of HAL on 29.01.2008. Your distro should 
update HAL with the changes.

> If i am wrong with my explanation, i'm sure that Danny will correct me 

Nothing wrong here 

Danny