Hello Eli,

Since you run Linux/ACPI on a Compaq Laptop, I'd like to know if you can 
actually get a battery readout (/proc/acpi/battery not empty). I can't get 
this to work on my laptop - Evo 1000v with RH9.0 with modified ACPI revision
20021212. If so, what version of kernel and ACPI are you using?

Thanks,
Erez Hadad

On Tuesday 25 November 2003 18:44, Eli Billauer wrote:
> Hello List.
>
> I have a Compaq Presario 2121EA. I recently recompiled the 2.4.22 kernel
> to make it support ACPI (a flavor of power management) and installed
> acpid as well.
>
> I do this for one single purpose: I want the laptop to shut down
> gracefully when the battery goes low. I must be sure about this working
> properly.
>
> The sample file for acpid says:
>
> event=button power.*
> action=/usr/local/bin/power.sh "%e"
>
> which is more or less a handling of the power button. While this makes
> some people enthusiastic, it's by far not what I need.
>
> What acpid does is to listen to /proc/acpi/events, and trigger off a
> program according to the nature of the event and the config files.
>
> My questions:
>
> (1) Does a low battery generate an "event"?
> (2) Does anyone know how to use ACPI to shut down a laptop gracefully?
> (3) In case I'll write an application of my own, that polls
> /proc/acpi/battery/(something): What behaviour can I expect from my
> laptop? Will it disconnect power by itself at some stage? What's the
> criterion for doing that? What should trigger off a graceful shutdown?
>
> Thanks,
>     Eli


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