On Fri, Jan 13 2006, Dave Jones wrote:
> On Fri, Jan 13, 2006 at 09:42:26PM -0600, Philipp Rumpf wrote:
> > Out of curiosity, why didn't you do the monitoring using
> > /proc/acpi/battery/.../{state,info} (while running off battery)? I
> > think that should have much finer granularity, and avoid various
> > capacitors that might be in the way and explain the effect you
> > noticed.
>
> ACPI battery reporting seems hit-or-miss at times.
> Sometimes it seems to not update for ages, and then suddenly
> there's a burst when suddenly 5% of the battery drains in
> seconds. As an overall 'how much battery is left' thing it seems
> ok, but I don't trust it for accurate measurements of power drain.
>
> Whether this is a firmware deficiency causing us not to see
> regular interrupts, or a problem with the acpi parser I don't know.
Or could very well be a problem with your battery.
--
Jens Axboe
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