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[Solved] [Power] Optimization

asked 2016-02-16 04:48:45 -0500

vetard gravatar image

updated 2016-02-18 12:31:38 -0500

Hi all,

I have recently installed on my Dell E7450 Fedora 23, in place of the Ubuntu 14.04 that the manufacturer installed. I've been hacking since there to optimize the power consumption, because I noticed a higher power consumption after the installation.

I usually work offline. I noticed (using powertop), when being offline, a power consumption from the wifi devices that can be up to 2 W. This consumption is equivalent to the consumption online.

Have you ever noticed such a behavior ? Is there a solution to lower the power consumption of Wifi/Radio devices when offline ? I was also wondering about the possibility to decrease the the power consumption of the WiFi device when online ?

Here is the output of the powertop tool when off-line: Power OFF-LINE

Here is the output of the powertop tool when on-line: Power ON-LINE

Thank you, Vivien

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So, do you want to tell us how you solved the problem? Feel free to write your own answer to your question and mark it as the correct one...

florian gravatar imageflorian ( 2016-02-18 13:22:37 -0500 )edit

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answered 2017-01-31 03:59:49 -0500

fisoxa gravatar image
  • You can use the powertop utility to see what’s drawing power when your system’s not plugged in.
  • This utility only runs on the Terminal, so you’ll need to open a Terminal to get it. Then run this command: sudo dnf install powertop
  • powertop needs access to hardware to measure power usage.
  • So you have to run it with special privileges too: sudo powertop

    Dell Latitude E7450 Manual gives you more details about this task.

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answered 2016-05-01 13:20:08 -0500

Alejandro Nova gravatar image

Fedora 23? Before following howtos made for other distros, check if you have tuned installed. tuned is a goodie made for Fedora that can be helpful. It's maintained, just as well as tlp, and it can save you. In a command prompt, type this.

# dnf install tuned tuned-utils

This will install tuned, and a fantastic utility, powertop2tuned. Run it.

# powertop2tuned laptop

After that, edit the file /etc/tuned/laptop/tuned.conf, and uncomment every line beginning with "/". Maybe this procedure will help with your WiFi connection, because there are power savings, coming from Runtime Power Management, that are simply being skipped here. This tool will do it.

Once you are ready:

$ tuned-adm profile laptop
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Asked: 2016-02-16 04:43:47 -0500

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Last updated: Feb 18 '16