From: John Ruttenberg <rutt@chezrutt.com>
To: dave@afrinc.com
Cc: linux-laptop@vger.kernel.org
Subject: Re: Dell Inspiron i8100 with 2 batteries
Date: Fri, 17 May 2002 11:25:47 -0400 [thread overview]
Message-ID: <15589.8443.496770.786194@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.21.0205171113550.1002-100000@puppy.afrinc.com>
I tried using ACPI, but it has shortcomings compared to APM. In particular,
with APM, you can use the function-setup, function-battery buttons to get into
the bios screens even while the kernel is running. I don't actually
understand how this magic works, but it works with APM and not ACPI.
David G Hamblen:
>
> I've got the same laptop with one battery, but I'm using ACPI. None of the
> current user-space utilities parse this stuff particularly well (the
> filenames in /proc/acpi have changed), but the data all look reasonable.
>
> #cat /proc/acpi/battery/BAT1/*
> alarm: 3000 mWh
> present: yes
> design capacity: 57420 mWh
> last full capacity: 57420 mWh
> battery technology: rechargeable
> design voltage: 14800 mV
> design capacity warning: 3000 mWh
> design capacity low: 1000 mWh
> capacity granularity 1: 200 mWh
> capacity granularity 2: 200 mWh
> model number: LIP8084DLP
> serial number: 40086
> battery type: LION
> OEM info: Sony Corp.
> present: yes
> capacity state: ok
> charging state: charging
> present rate: unknown
> remaining capacity: 56670 mWh
> present voltage: 16746 mV
>
> Dave
>
> On Fri, 17 May 2002, John Ruttenberg wrote:
>
> > I thought I'd try to figure out that there were two batteries and divide by 2
> > or something like that. Perhaps the bios of this notebook is just broken,
> > though.
> >
> > Alan Cox:
> > > > of the batteries is less than 50% (according to the bios), then /proc/apm
> > > > shows the battery power level X 2. If the combined charge of the batteries is
> > > > greater than 50%, then /proc/apm shows:
> > > >
> > > > 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
> > > >
> > > > I think this is because the bogus calculation it would make would result in a
> > > > percentage > 100.
> > > >
> > > > I took a quick look at arch/i386/kernel/apm.c but it wasn't obvious what to
> > > > do.
> > >
> > > The data basically comes from the BIOS as is
> >
> >
> >
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
> >
next parent reply other threads:[~2002-05-17 15:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <15589.5673.460356.221529@localhost.localdomain>
[not found] ` <Pine.LNX.4.21.0205171113550.1002-100000@puppy.afrinc.com>
2002-05-17 15:25 ` John Ruttenberg [this message]
2002-05-15 15:14 Dell Inspiron i8100 with 2 batteries John Ruttenberg
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