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Thread: Can I reduce heat in 13.04 the way I did with Jupiter

  1. #1
    Join Date
    Jun 2010
    Location
    Italy
    Beans
    67
    Distro
    Ubuntu 12.04 Precise Pangolin

    Can I reduce heat in 13.04 the way I did with Jupiter

    I have strange amd switchable hybrid graphics

    [Mobility Radeon HD 4225/4250] vendor: Advanced Micro Devices [AMD] nee ATI --- and---[Mobility Radeon HD 5430/5450/5470] vendor: Advanced Micro Devices [AMD] nee ATI

    on the same machine
    Ubuntu has never played nice with this hardware, but it wasn't a problem because I could use Jupiter to bring heat down to a level where my machine didn't get cooked. (Ubuntu switches both integrated and graphics chips on at the same time and runs them on full power even when cpu usage is at single digits = things get hot)

    I could really use e.g tricks for removing unused modules, or for setting all PCI buses to drop into idle mode quicker...
    tmpfs'ing the firefox temp folder because it fsyncs() to the hard-drive everytime you browse a page causing no end of hard-drive activity...apparently.

    Any links with walkthroughs would be appreciated.
    I can't fix my graphics driver, but maybe I can get the heat down some other way?
    My site - for my role-playing games, spaceships and stuff like that.

  2. #2
    Join Date
    May 2013
    Location
    Slovakia
    Beans
    39
    Distro
    Ubuntu 13.10 Saucy Salamander

    Re: Can I reduce heat in 13.04 the way I did with Jupiter

    Hi, I'm not sure about your GPU... you probably need proprietary drivers to turn off one of your graphics... or some open source tool to do that (something like Bumblebee for nVidia or maybe Ironhide), but I don't know any for ATI cards...

    As a Jupiter replacement try TLP
    Code:
    sudo add-apt-repository ppa:linrunner/tlpsudo apt-get update
    sudo apt-get install tlp tlp-rdw
    sudo tlp start
    and install Powertop and change tunables:
    Code:
    sudo apt-get install powertop
    for tmpfs I use this in /etc/fstab :
    Code:
    tmpfs   /tmp       tmpfs   defaults,noatime,mode=1777   0  0
    tmpfs   /var/spool tmpfs   defaults,noatime,mode=1777   0  0
    tmpfs   /var/tmp   tmpfs   defaults,noatime,mode=1777   0  0
    tmpfs   /var/log   tmpfs   defaults,noatime,mode=0755   0  0
    replace /tmp with firefox sync folder...

    you can disable startup apps... to show hidden startup apps:
    Code:
    sudo sed -i 's/NoDisplay=true/NoDisplay=false/g' /etc/xdg/autostart/*.desktop
    Last edited by dankojoffrey; May 15th, 2013 at 04:08 PM.

  3. #3
    Join Date
    Jun 2010
    Location
    Italy
    Beans
    67
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Can I reduce heat in 13.04 the way I did with Jupiter

    Found a solution!!
    http://askubuntu.com/questions/96983...tdown-ati-card
    put this command in a terminal
    echo OFF | sudo tee /sys/kernel/debug/vgaswitcheroo/switch
    and my temperature dropped from 80 to 60
    happy happy

    It's not persistant so it would be great if I could add it to some registry, but I'm happy to type it every time if I have to.
    Last edited by spaceshipguy; May 16th, 2013 at 02:15 AM.
    My site - for my role-playing games, spaceships and stuff like that.

  4. #4
    Join Date
    May 2013
    Location
    Slovakia
    Beans
    39
    Distro
    Ubuntu 13.10 Saucy Salamander

    Re: Can I reduce heat in 13.04 the way I did with Jupiter

    if you want to make it persitant, try add this echo command to /etc/rc.local

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