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Thread: Fan control script

  1. #21
    Join Date
    Oct 2005
    Beans
    127

    Re: Fan control script

    Thanks, cornelius2! I'm using your patch now. The gradual change seems to work well.

    So there's no point in setting sensorsUsed greater than 2 in a dual-core machine, right? (At least if you consider that the CPU sensors are the only useful ones for the script.)

    Tiago

  2. #22
    Join Date
    Mar 2006
    Beans
    19

    Re: Fan control script

    Quote Originally Posted by tiagobt View Post
    So there's no point in setting sensorsUsed greater than 2 in a dual-core machine, right? (At least if you consider that the CPU sensors are the only useful ones for the script.)
    Well, the CPU temperature seems to rise and drop very quickly. Therefore, some of the appleSMC sensors may reflect the temperature you feel under your palms better (which changes more slowly). So, using a few appleSMC sensors (though I don't know which one is which) in addition to CPU sensors to set the fan speed might not be a bad idea.

  3. #23
    Join Date
    Oct 2005
    Beans
    127

    Re: Fan control script

    I've made some experiments and I've noticed a big difference using 2 or 4 sensors.

    If I use 2 sensors, the temperature reported in the log is around 25-30 degrees, and the fan speed is very low (2000 rpm).

    If I use 4 sensors, the temperature reported in the log is around 50-56 degrees, and the fan speed is around 4800-5000 rpm.

    The temperatures measured with 4 sensors look more realistic to me. I'd say using 4 sensors is safer. What do you think?

  4. #24
    Join Date
    Mar 2006
    Beans
    19

    Re: Fan control script

    I think both are safe enough. Laptops are just designed such that some part will be warmer (and will tolerate more heat) than other parts. Also, you're not limited to only tweaking that parameter, you can play with the other parameters there too. Though, at the end your parameter choices will come down to which one of these you prefer: heat or fan noise.

  5. #25
    Join Date
    Aug 2005
    Location
    Huntsville, AL, USA
    Beans
    7,526
    Distro
    Ubuntu

    Re: Fan control script

    the default speed for my macbook pro in OS X is about 2000 rpms, and I force it up when plugged into an external power source.

  6. #26
    Join Date
    Aug 2008
    Location
    North Dakota
    Beans
    14
    Distro
    Ubuntu Development Release

    Re: Fan control script

    wow, i just realized you have to cd into the "smcfancontrol" folder, then execute the install script...i also added the "s" on this line.. update-rc.d $initscript defaults[/B] $scriptrlevel || fatal "Failed to install rc-scripts"

  7. #27
    Join Date
    Mar 2009
    Location
    /home/joushou
    Beans
    30
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Fan control script

    It should work OK now...
    Once upon a time, there was.
    Then, there wasn't.
    - A description of life, the universe, and everything.

  8. #28
    Join Date
    Oct 2007
    Location
    Toronto
    Beans
    35
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Re: Fan control script

    Quote Originally Posted by Joushou View Post
    when i installed Snow Leopard
    Apologies for going off-topic, buy how do you have Snow Leopard? Are you an Apple dev? Torrent?
    I like OS X better, actually.

  9. #29
    Join Date
    Mar 2009
    Location
    /home/joushou
    Beans
    30
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Fan control script

    If you an Apple Premium/Select member, you get access to their developer seeds. You can also receive a download-ticket from someone with such account, and get access to it with a free account (They got a certain amount of tickets to share).

    Not that i have Premium/Select membership, nor a ticket... (Yeah, it was a torrent... After buying my Segway, i didn't have $3499 left for the membership, but i swear i'm going to buy the release!)
    Last edited by Joushou; July 29th, 2009 at 10:05 AM.
    Once upon a time, there was.
    Then, there wasn't.
    - A description of life, the universe, and everything.

  10. #30
    Join Date
    Sep 2005
    Location
    Winnipeg, Canada
    Beans
    174
    Distro
    Ubuntu

    Re: Fan control script

    this excellent script still quits sometimes. As a workaround I scheduled a cron job to restart it every 4 minutes. Now lappy is nice and cool.


    I added the following line to /etc/crontab

    */4 * * * * root pkill smcfancontrol && /etc/init.d/smcfancontrol.sh start
    linux, linux, linux

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