linux-kernel - Re: [PATCH] battery: Fix charge_now returned by broken batteries

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Date:	Sat, 10 Oct 2009 23:25:21 +0200
From:	Pavel Machek <pavel@....cz>
To:	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc:	Alexey Starikovskiy <astarikovskiy@...e.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] battery: Fix charge_now returned by broken batteries

Hi!

> >> In "broken" batteries (is it broken finally? or is it expected
> >> behaviour?) like mine the old problem will be corrected, as it was
> >> only present in the charged state.
> >
> > I believe you better work around this in userspace... or agree that
> >>100% charge is possible.
> 
> I agree that >100% charge is possible while charging (because that
> would mean the battery is over the last charged level); however, what
> does it mean when charged?

Well, maybe the battery only updates full_charge_capacity during
powerdown or when the moon is full or something? (IOW you may be
breaking already working machines).

> In any case, my laptop's battery is not charging over 100% its
> original capacity anyway, just reporting a wrong value.

True. But I do not think  you are fixing it properly. Maybe ask for
fixed BIOS?

Or perhaps add quirk based on DMI or something?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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