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Thread: Decent power management?

  1. #1
    Join Date
    Oct 2006
    Beans
    45

    Decent power management?

    Hi all

    I live off grid on a 12v solar powered system. I have a Samsung N220 which I believe is pretty efficient. I'd like to make it as good as it can be. I keep the backlight on the minimum my eyes can bear. When plugged into the external 12v DC the laptop thinks it's on mains, but it's not. Ideally I would like:

    * Default lowest power settings for everyday use on internal battery or external 12v DC
    * Option to turn on max performance manually when I need to compile a kernel or whatever

    So far my googling and efforts amount to:

    1. Bluetooth on by default is a pain. Tried Editing etc/rc.local file, & added this line:Code: rfkill block bluetooth but bluetooth is still on on a reboot. I hardly ever use bluetooth but do occasionally so don't want to break it by removing the whole bluez stack. Ideas?

    2. I installed Powertop and looked at the tunables, great let's make those settings permanent.

    3. To make Tunables permenent Google found this http://sourceforge.net/apps/mediawik...p?title=Kernel
    but my version of powertop just say's Good/ Bad not the useful string quoted in the above. Am I using it wrong?

    4. I installed Jupiter: http://www.webupd8.org/2011/09/jupit...lable-for.html and now it pops up little messages seemingly at random saying 'powersave mode' or 'max power mode' or whatever. No applet has appeared on my top bar, clicking the 'lighting' icon in applications seems to do nothing.

    Where do I go from here?

    Thanks

    Sam
    Last edited by sam_uk; March 16th, 2013 at 10:00 PM.

  2. #2
    Join Date
    Oct 2006
    Beans
    45

    Re: Decent power management?

    OK so I followed my own link

    And found this: http://www.webupd8.org/2011/04/how-t...tion-area.html

    After doing that I can now see a Jupiter icon in the bottom right of my screen, partial success! I can now swap modes. Great.

    However:

    1. In 'powersave' mode my powertop looks like this:

    Bad VM writeback timeout
    Bad Enable Audio codec power management
    Bad Enable SATA link power management for /dev/sda
    Bad Autosuspend for USB device MB525 [Motorola]
    Bad Autosuspend for USB device WebCam SCB-0340N [Namuga.]
    Bad Autosuspend for USB device Broadcom Bluetooth 2.1 Device [Broadcom Corp]
    Bad Autosuspend for USB device EHCI Host Controller [usb1]
    Bad Autosuspend for USB device UHCI Host Controller [usb2]
    Bad Autosuspend for USB device UHCI Host Controller [usb3]
    Bad Autosuspend for USB device UHCI Host Controller [usb4]
    Bad Autosuspend for USB device UHCI Host Controller [usb5]
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family USB UHCI Controller #1
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family SATA Controller [AHCI mode]
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family PCI Express Port 3
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family PCI Express Port 4
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family High Definition Audio Controller
    Bad Runtime PM for PCI Device Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphi
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family USB UHCI Controller #2
    Bad Runtime PM for PCI Device Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx DMI Bridge
    Bad Runtime PM for PCI Device Marvell Technology Group Ltd. 88E8040 PCI-E Fast Ethernet Controller
    Bad Runtime PM for PCI Device Intel Corporation NM10/ICH7 Family USB UHCI Controller #4
    Bad Runtime PM for PCI Device Realtek Semiconductor Co., Ltd. RTL8192E/RTL8192SE Wireless LAN Contro

    I'd really like to get those to 'good' and keep on reboot.

    2. I still have to turn off bluetooth on every reboot.

    Thanks

    Sam

  3. #3
    Join Date
    Oct 2006
    Beans
    45

    Re: Decent power management?

    So I found out how to save the powertop recomendations & bluetooth and posted my findings today in a tutorial format: http://ubuntuforums.org/showthread.p...259&p=12560405
    Last edited by sam_uk; March 16th, 2013 at 09:59 PM.

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