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Thread: HowTo: Undervolt your notebook CPU for longer battery life

  1. #201
    Join Date
    Nov 2007
    Location
    Singapore
    Beans
    43
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    the test werent giving me accurate Vids,
    i got this 9:37 8:27 6:21 136:11
    from cat /sys/devices/system/cpu/cpu0/cpufreq/phc_controls

    my tweaked vids output was 6 6 1 1
    echoed it, and was never able to boot up again in ubuntu until i undo the echo

  2. #202
    Join Date
    Jul 2005
    Location
    Berlin, Germany
    Beans
    415
    Distro
    Ubuntu Development Release

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    Module for latest Intrepid kernel, 2.6.27-4-generic (32 bit)
    Attached Files Attached Files
    Linux user since Slackware 3.4

  3. #203
    Join Date
    Feb 2006
    Location
    Slovenia
    Beans
    3
    Distro
    Gutsy Gibbon Testing

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    Did anybody build the module successfully for 64-bit Intrepid kernel? It seems that all positive reports are with 32-bit kernel...

    When I try to build it myself, it fails to load with module format error.
    If somebody would share a working 64-bit module, I would be more than happy.

  4. #204
    Join Date
    Apr 2008
    Beans
    246

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    OK. I did everything and it was correct, up until I ran the script. It went all the way down to 0 and stopped.

    Code:
    Default VIDs: 40 34 30 25
    Current VIDs: 0 34 30 25
    Testing VID: 0 (700 mV)
    ..............................
    Default VIDs: 40 34 30 25
    Current VIDs: -1 34 30 25
    Testing VID: -1 (684 mV)
    ./linux-phc-optimize.bash: line 161: printf: -1: invalid option
    printf: usage: printf [-v var] format [arguments]
    
    
    The lowest acceptable VID is 0.
    
    Recovering CPU.
    ./linux-phc-optimize.bash: line 138: 11296 Terminated              burnMMX
    
    Run this script again to continue the optimization.
    Then when I tried to run the script again...

    Code:
    Load VIDs from 'phc_tweaked_vids'
    > ERROR: Wrong VID count!
    And it stops. Help?

  5. #205
    Join Date
    Sep 2008
    Beans
    3

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    I have set everything up and run the script, but it will not run past my 3rd VID....it will not save the 3rd VID either.

    here is what it saves:

    16 8 30 26 22 18

    why will it not continue?

    when I run the script now, it goes down to "4" which would replace the 30 and crashes, but never saves the "4"

  6. #206
    Join Date
    Sep 2008
    Beans
    3

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    Quote Originally Posted by dman4486 View Post
    i have set everything up and run the script, but it will not run past my 3rd vid....it will not save the 3rd vid either.

    Here is what it saves:

    16 8 30 26 22 18

    why will it not continue?

    When i run the script now, it goes down to "4" which would replace the 30 and crashes, but never saves the "4"


    nobody?

  7. #207
    Join Date
    Sep 2008
    Beans
    3

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    ok....figured out that issue, now how do I do step 5? I have rc0, rc1, rc2, rc3, rc4

  8. #208
    Join Date
    Oct 2008
    Beans
    7

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    Hey guys,

    I have a T5870 and my fids are:

    Code:
    root@x64ubuntu8041:~# cat /sys/devices/system/cpu/cpu0/cpufreq/phc_fids 
    11 10 8 6 136 
    root@x64ubuntu8041:~# cat /sys/devices/system/cpu/cpu1/cpufreq/phc_fids 
    11 10 8 6 136 
    root@x64ubuntu8041:~#
    But I cant set down the processor to 600mHz, to 800mHz only

    In the windows I can set the 600mHz (6x100) with rmclock successful, why not in linux?

    Can anyone set down a C2D-processor to 600mHz? And if yes, how?

    Regards
    kasjak2000

  9. #209
    Join Date
    Jul 2005
    Location
    Berlin, Germany
    Beans
    415
    Distro
    Ubuntu Development Release

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    Module for latest Intrepid kernel, 2.6.27-5-generic (32 bit)
    Attached Files Attached Files
    Linux user since Slackware 3.4

  10. #210
    Join Date
    Nov 2005
    Location
    Cambrils, Catalonia
    Beans
    1,130

    Re: HowTo: Undervolt your notebook CPU for longer battery life

    I'm running latest intrepid kernel (2.6.27-5-generic) succesfully with the phc extensions, and also was running 2.6.27-4-generic.

    How I did? First I moved the acpi-cpufreq.ko original module to acpi-cpufreq.ko-original, then installed the linux-phc package from here http://ppa.launchpad.net/bonniot-use...n/l/linux-phc/ and rebooted.

    After rebooting you can run sudo linux-phc-install and reboot, it should work fine. After that I removed the linux-phc package, since it seemed to give out an error when installed.

    If I didn't move the acpi-cpufreq.ko module out of the way it gave me an error.

    Hope it helps

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