KaBuTe - Dummy Hacker

 (Sorry for the flash...)

This is not really new, but it is very interesting as it can give you up to 1 hour more to your battery life.

The trick is easy: update your kernel to 2.6.21 if you are using a 32 bit system or 2.6.23 if you are using a 64 bit system. Of course recompile it but remember to activate the Tickless option (Processor Type and Features -> Tickless System (Dynamic Tics) ), or in the .config file: CONFIG_TICK_ONESHOT=y and CONFIG_NO_HZ=y .

After this install Intel's powertop: #apt-get install powertop

Now run it as root (and follow the tips shown):  #powertop

I've made a little script using powertop's tips (you can save it in /bin/min_power):

#!/bin/bash

echo min_power >/sys/class/scsi_host/host0/link_power_management_policy
echo 1500 > /proc/sys/vm/dirty_writeback_centisec