[arch-general] Battery question about a Firmware Bug in logs.

[Leonid Isaev]

On Thu, 5 Jan 2012 00:14:42 +0100
Martti Kühne <mysatyre at gmail.com> wrote:

> On Wed, Jan 04, 2012 at 01:45:43PM -0800, Don Juan wrote:
> > Battery 0: Discharging, 87%, 01:57:08 remaining
> > 
> > That is all the output I get. Is there a file that is related to
> > discharge rate some place I can not find? Is this rate built into
> > the kernel? From what I read this is built in to the kernel but I am
> > not sure I am grasping that. Am I chasing something that is moot to
> > overall performance and stability of the laptop? Can I give any
> > other info I am not thinking of sharing? Is this question that bad I
> > get the silence? ;)
> > 
> 
> well, back when I was using a laptop I used /proc/acpi/battery/BAT*/* where
> a state file gave information in mAh about the full state and the present
> state in which it is discharging. crafting a progressive algorithm that
> dynamically averages battery usage and calculates a remaining time from it
> shouldn't be that hard.
> 
> I'm not really sure where the mechanism that is trying to calculate these
> things for you is coming from, and myself would try to shut it down / see
> myself to make things cope with strange data. How correct is the estimate you
> get, anyway?
> 
> On another notice, does the error make your cpu go crazy or something else
> imminent like this? Because otherwise I wouldn't worry too much about it.
> 
> cheers!
> mar77i

/proc ACPI entries have been deprecated. All files are now located
in /sys/class/power_supply. The correctness of numbers in there depends on your BIOS and can be completely nonexistent...

-- 
Leonid Isaev
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Key fingerprint: C0DF 20D0 C075 C3F1 E1BE  775A A7AE F6CB 164B 5A6D
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