Re: Saving battery power

[Thorsten Schmidt <meine_mailings@web.de>]

Hello,

Am Freitag, 9. März 2007 20:32 schrieb Thorsten Schmidt:
> Hello at all,
>
> for some time I've been trying to reduce my laptop's power consumption
> (while running on battery power) on my Fujitsu-Siemens Lifebook C1320 with
> Debian etch.
> - I echo powersave to /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> - I installed laptop-mode in order to shut down my harddrive if it is
> unused. - I don't use swap,  /tmp/ is a ramdisk-mount and /var/tmp links to
> /tmp, (I've 1 GB RAM)
> Thus my hd is barely used and my CPU reaches C3.
>
> But for some reason, Windows is more efficient in power saving. (3,5h vs.
> 4,5h battery life while surfing wireless).
> Is there anything else I can do to save battery power?

I noticed that, I accidentely shut down my radio on XP while testing.
If radio is enabled, both system are about to run 3,5h.

But for some reason, disabling the radio on XP gives me 50min while 
disableling it on linux give 15min - even if ipw2200.ko is unloaded...

Regards
Thorsten