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Thread: Using PowerTOP 2.6 Saves Power, Extends Battery Life On Ubuntu 14.04

  1. #1
    Join Date
    Jan 2007
    Posts
    14,788

    Default Using PowerTOP 2.6 Saves Power, Extends Battery Life On Ubuntu 14.04

    Phoronix: Using PowerTOP 2.6 Saves Power, Extends Battery Life On Ubuntu 14.04

    With the release of Intel's PowerTOP 2.6 a few days ago I have done some benchmarking using an ASUS Zenbook Prime ultrabook to see the impact of the power consumption while running on battery for a clean, stock install of Ubuntu 14.04 LTS 64-bit and then did the same tests again after having PowerTOP 2.6 optimize the system so it's in a good power standing. Beyond testing the stock Linux 3.13 kernel, then I carried out the same tests again when using the Linux 3.15 kernel in its very latest development state.

    http://www.phoronix.com/vr.php?view=20437

  2. #2

    Default

    Micheal, is it possible to run the same test on an older setup, to see if power improvements of the next kernel is also for older hardware ? I have a Pentium T3200 based laptop, and I want to see if I will be able to almost match the windows battery life.

  3. #3
    Join Date
    Feb 2014
    Posts
    7

    Cool best power monitor

    i did able to get idle watt around 8.5-9.5 W, and on movie playback around 13-14W(with 3.14 kernel on i7-3630qm), turn everything in powertop does not always saves power, i still follow the power-saving guide from archlinux.

  4. #4
    Join Date
    Mar 2009
    Posts
    68

    Default

    Well, ok, but comparing it with stock Ubuntu is not that useful, it would be more useful to compare it to the "fire and forget" methods like laptopmode settings.

  5. #5
    Join Date
    Nov 2010
    Posts
    2

    Default

    You can add
    Code:
    powertop --auto-tune
    somewhere in init scripts and forget

  6. #6
    Join Date
    Mar 2009
    Posts
    68

    Default

    Quote Originally Posted by c2p_ View Post
    You can add
    Code:
    powertop --auto-tune
    somewhere in init scripts and forget
    Yeah sure, but my question is more on the line is it worth to install powertop over laptopmode settings? It is clear that it is worth do something more than just stick to the default... but which?

  7. #7
    Join Date
    Jul 2013
    Posts
    59

    Default

    This is one of those things which I think should be included in Ubuntu, all the work done behind the scenes with a toggle in the Settings between performance states.

    I don't need to install a Power Manager in Windows or Mac to get optimisation.

  8. #8
    Join Date
    Jan 2014
    Posts
    32

    Default

    Quote Originally Posted by c2p_ View Post
    You can add
    Code:
    powertop --auto-tune
    somewhere in init scripts and forget
    How do I add that with systemd?

  9. #9

    Default systemd unit file

    Quote Originally Posted by ihatemichael View Post
    How do I add that with systemd?
    Create a simple service file, say /etc/systemd/system/powertop.service:

    Code:
    [Unit]
    Description=PowerTop
    
    [Service]
    Type=oneshot
    RemainAfterExit=yes
    ExecStart=/usr/sbin/powertop --auto-tune
    
    [Install]
    WantedBy=multi-user.target
    To enable it at boot:
    $ systemctl enable powertop

  10. #10

    Default

    you also need to add the following line to the [service] section, as powertop appearently needs a terminal to run:

    Code:
    Environment="TERM=xterm"
    source: Arch Wiki - Powertop

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