If you don't need infrared support,
disable it in the BIOS or shutdown the
IrDA device driver. There are also some
IrDA features of the kernel which are
useful for saving power.
In the specifications of my HP
OmniBook 800 it is recommended to turn
off the IR port, if it is not in use,
because it may consume up to 10
percent of the battery time.
If necessary, you may also try to
disable the Fast
RRs feature in the IrDA
section of the kernel. This option
will give you much better latencies
but will consume more power.
PCMCIA services consume much power, so shut them down if you don't need them.
I'm not sure to which extend the
backlight
consumes power. WARNING: AFAIK
this device can only bear a
limited number of uptime circles.
So avoid using screensavers too
much.
For some examples to build
batteries with increased uptime
up to 8 hours look at Adorable
Toshiba Libretto
http://www.cerfnet.com/˜adorable/libretto.html.
For information about APM look at the APM chapter above.
A hacked rclock . Booker
C. Bense has hacked the
rclock
program to include a simple
battery power meter on the
clock face.
xbatstat. A battery level status checker for Linux and X.
KDE http://www.kde.org provides
KAPM,
Kbatmon
and
Kcmlaptop.
Written by Paul Campbell
kcmlaptop
is a set of KDE control
panels that implements
laptop computer support
functions, it includes a
dockable battery status
monitor for laptops - in
short a little icon in the
KDE status bar that shows
how much battery time you
have left. It also will warn
you when power is getting
low and allows you to
configure power saving
options.
Similar packages you may find at the GNOME project http://www.gnome.org/ . See the software maps at both sites.
Please see Battery Powered
Linux Mini-HOWTO by Hanno
Mueller, hanno at lava.de
http://www.lava.de/˜hanno/
for more information.
toshiba-fan
Turn the fan on a
Toshiba Pentium laptop
on or off. This is a
command line utility to
turn the fan of a
Toshiba laptop on or
off, or view its current
state. It should work on
all Toshiba Pentium
laptops that have fans.
