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>16. Using ACPI</H1
><P
>There are a few different applications/daemons you will want to install
on your system: <SPAN
CLASS="application"
>acpid</SPAN
> (the daemon that will control your hardware states), and <SPAN
CLASS="application"
>acpi</SPAN
> (the interface to monitor events and states) are the base install. The
<SPAN
CLASS="application"
>acpi</SPAN
> Debian package is only available in testing and is unstable. If
you're running stable you won't be able to install it without playing
around with apt and your <TT
CLASS="filename"
>list.sources</TT
> file. You can probably
also compile from source. If you do get <SPAN
CLASS="application"
>acpi</SPAN
>
installed you can use it to monitor your system like this: <B
CLASS="command"
>acpi
<TT
CLASS="option"
>-V</TT
></B
>. The output will tell you about your
system. Mine looks like this:</P
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> Thermal 1: ok, 47.1 degrees C
Thermal 2: ok, 45.1 degrees C
AC Adapter 1: off-line <-- running off battery
AC Adapter 1: on-line <-- running off AC power
</PRE
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><P
>Unfortunately, the <TT
CLASS="option"
>-V</TT
> <SPAN
CLASS="QUOTE"
>"full version"</SPAN
> doesn't work for me.
Fortunately I can still look in each of the acpi files individually for
information about my system. Check in the <TT
CLASS="filename"
>/proc/acpi</TT
> directory
for various things of importance. If I want to check my battery I read the
following file like this: <B
CLASS="command"
>cat
<TT
CLASS="filename"
>/proc/acpi/battery/BAT0/state</TT
></B
>. The output is as follows:</P
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> present: yes
capacity state: ok
charging state: discharging <-- running off battery
present rate: unknown
remaining capacity: 3920 mAh <-- watch this number
present voltage: 14800 mV
</PRE
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> present: yes
capacity state: ok
charging state: discharging
present rate: unknown
remaining capacity: 3840 mAh <-- capacity getting smaller
present voltage: 14800 mV
</PRE
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> present: yes
capacity state: ok
charging state: charging <-- AC adapter plugged in
present rate: unknown
remaining capacity: 3840 mAh
present voltage: 14800 mV
</PRE
></FONT
></TD
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><P
>If I want information about my battery in general I check it out like
this: <B
CLASS="command"
>cat <TT
CLASS="filename"
>/proc/acpi/battery/BAT0/info</TT
></B
></P
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> present: yes
design capacity: 3920 mAh
last full capacity: 3920 mAh
battery technology: rechargeable
design voltage: 14800 mV
design capacity warning: 30 mAh
design capacity low: 20 mAh
capacity granularity 1: 10 mAh
capacity granularity 2: 3470 mAh
model number: Bat0
serial number:
battery type: Lion
OEM info: Acer
</PRE
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><P
>You're smart people. You can probably figure it out from here. :)</P
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