Save power with Ubuntu 9.04 (Jaunty Jackalope) on a ThinkPad T400

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Revision as of 18:51, 20 April 2009 by Manuel (Talk | contribs)

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// have to read wiki syntax to format correctly//

Basic information:

I have Thinkpad T400 WC8......

9 cell battery now 60% last 4.37 h

Idle consumtion after this tipps: 11-13 watts

I use the ATI Card with the fglrx drivers, unfortunatelly the have no option to save power.

I use powernowd, Gudiance Power manager and KDE4.2 powerdevil.

I will get into deeper later.

Let's start:

Stop deamons you don't need with rcconf

Set wlan and bluetooth off (hardware switch)

Deaktivate the touchpad.

My Bios Settings:

Bluetooth off

Modem off

//have to look up other things//

Script to save power

This script reduce the power consumtion to 13-16 watts

Save this script as /etc/rc.local and do chmod +x on it

Then modify /etc/kde4/kdm/Xsetup

and add:

exec /etc/rc.local

before exit 0

The script:


Modify the xorg

Modify like this:

Section "Device"

       Identifier  "Configured Video Device"
       Driver      "fglrx"


       Option      "DynamicClocks" "true"
       Option      "PowerState" "1"
       BusID       "PCI:1:0:0"



Section "Monitor"

       Identifier   "aticonfig-Monitor[0]-1"
       Option      "VendorName" "ATI Proprietary Driver"
       Option      "ModelName" "Generic Autodetecting Monitor"
       Option      "DPMS" "true"                              


Use powernowd

install powernowd

Then modify /etc/default/powernowd

with this parameters(add after -q with a space after q):

-m 2 -l 20 -u 70 -s 300000

Powerdevil settings

Powersave Profile Settings:

general: Disable Composite

Dim after 1 min

Idle for +20 min shutdown

Lid: lock screen

  • Button: Show logout dialog


Screen Brighness 75 %

enable display power management

standby 3 min suspend 6 min power off 8min


scaleing: userspace sheme: powersave

Gudiance PowerManager

Lock screen after resume

Battery Powered:

Brightness 75%

drops below 10 min --> shutdown idle more than XXX do nothing cpu freq: dynamic (changed from powernowd then) Lid: lock screen

Well good luck and have fun i think if you use the intel card you can additionally save 3-5 watts