Optimising power consumption of backlight and wifi

Hi there,
Do you have any effective measures in place to optimise power consumption of backlight and wifi?
On my Thinkpad X200T they are by far the biggest consumers of power.
How much does backlight and wifi consume on your laptops?

@centos
Well, I tried acpi_osi='!Windows 2012' acpi_backlight=legacy and got 11.9 W and 4 hours which is a record
Interestingly when the results were 13.5 W and 15 W powertop showed
7.66 W 33.7% Device Display backlight
Now it shows
11.0 W 76.8% Device Display backlight
@orschiro
And I also have it twice
orschiro wrote:
If you go to the Device stats tab, you see that the % column is labelled Usage.
Out of curiousity, is Display Backlight displayed twice for you under Device Stats?
With acpi_osi='!Windows 2012' acpi_backlight=legacy and 11.9 W and 4 hours
5.52 W 76.8% Display backlight
5.52 W 20.0% Display backlight
Without acpi_osi='!Windows 2012' acpi_backlight=legacy and 13.5 W and approximately 3 hours
3.83 W 33.7% Display backlight
3.83 W 20.0% Display backlight

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Last edited by demian (2011-05-28 21:10:30)

akurei@joel: ~ $ LANG=C thinkwatt -r 60 /home/akurei/test
recording power consumption for the next 60 seconds
/usr/bin/thinkwatt: line 100: /tmp/thinkwatt/28606.dat: No such file or directory
mv: cannot stat `/tmp/thinkwatt/28606.dat': No such file or directory
error: file not found.
average consumption during the last 60 seconds was W
do you want to create a graphic now, too? y/n y
error: file not found.
akurei@joel: ~ $ LANG=C thinkwatt -r 60
recording power consumption for the next 60 seconds
/usr/bin/thinkwatt: line 100: /tmp/thinkwatt/29019.dat: No such file or directory
error: file not found.
average consumption during the last 60 seconds was W
do you want to create a graphic now, too? y/n y
error: file not found.
akurei@joel: ~ $ yaourt -Qi gnuplot
Name : gnuplot
Version : 4.4.3-1
URL : http://www.gnuplot.info
Licenses : custom
Groups : None
Provides : None
Depends On : readline gd wxgtk cairo libjpeg lua
Optional Deps : None
Required By : None
Conflicts With : None
Replaces : None
Installed Size : 3016.00 K
Packager : Ronald van Haren <[email protected]>
Architecture : x86_64
Build Date : Fri May 6 10:55:29 2011
Install Date : Mon May 16 17:04:26 2011
Install Reason : Explicitly installed
Install Script : Yes
Description : Plotting package which outputs to X11, PostScript, PNG, GIF, and others
akurei@joel: ~ $ yaourt -Qi tp_smapi
Name : tp_smapi
Version : 0.40-5
URL : http://tpctl.sourceforge.net/
Licenses : GPL
Groups : None
Provides : None
Depends On : mkinitcpio>=0.6.8 module-init-tools>=3.12-2
Optional Deps : None
Required By : None
Conflicts With : None
Replaces : None
Installed Size : 220.00 K
Packager : Michael Duell <[email protected]>
Architecture : x86_64
Build Date : Mon May 16 17:03:41 2011
Install Date : Mon May 16 17:03:50 2011
Install Reason : Explicitly installed
Install Script : Yes
Description : Modules for ThinkPad's SMAPI functionality
akurei@joel: ~ $ yaourt -Qi gawk
Name : gawk
Version : 3.1.8-2
URL : http://www.gnu.org/directory/GNU/gawk.html
Licenses : GPL
Groups : base
Provides : awk
Depends On : sh glibc
Optional Deps : None
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Conflicts With : None
Replaces : None
Installed Size : 2224.00 K
Packager : St
Architecture : x86_64
Build Date : Sat Nov 20 04:00:45 2010
Install Date : Thu May 5 19:05:55 2011
Install Reason : Explicitly installed
Install Script : Yes
Description : Gnu version of awk
akurei@joel: ~ $ yaourt -Qi sed
Name : sed
Version : 4.2.1-3
URL : http://www.gnu.org/software/sed
Licenses : GPL3
Groups : base
Provides : None
Depends On : acl sh
Optional Deps : None
Required By : ca-certificates fakeroot grub mkinitcpio packer thinkwatt
Conflicts With : None
Replaces : None
Installed Size : 804.00 K
Packager : St
Architecture : x86_64
Build Date : Fri Nov 19 22:35:32 2010
Install Date : Thu May 5 19:05:55 2011
Install Reason : Explicitly installed
Install Script : Yes
Description : GNU stream editor
akurei@joel: ~ $ lsmod|grep tp_smapi
tp_smapi 20043 0
thinkpad_ec 4085 2 hdaps,tp_smapi
Last edited by akurei (2011-05-16 15:36:40)

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Optimising power consumption of backlight and wifi

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