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Thread: 'There are no pwm-capable sensor modules installed'

  1. #1
    Join Date
    Jun 2011

    Lightbulb 'There are no pwm-capable sensor modules installed'

    After reinstall my ubuntu 11.10 I can't control my fan speed (before reinstall everything was good)

    Look at this:
    root@muhahaha:/home/karol# sensors
    Adapter: PCI adapter
    temp1:        +25.8°C  (high = +70.0°C)
    root@muhahaha:/home/karol# pwmconfig
    # pwmconfig revision 5857 (2010-08-22)
    This program will search your sensors for pulse width modulation (pwm)
    controls, and test each one to see if it controls a fan on
    your motherboard. Note that many motherboards do not have pwm
    circuitry installed, even if your sensor chip supports pwm.
    We will attempt to briefly stop each fan using the pwm controls.
    The program will attempt to restore each fan to full speed
    after testing. However, it is ** very important ** that you
    physically verify that the fans have been to full speed
    after the program has completed.
    /usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed
    Before reinstall I had more sensors. What should I do? Ubuntu 11.10 64bit
    Last edited by karol4722; November 8th, 2011 at 04:39 PM.

  2. #2
    Join Date
    Nov 2009

    Re: 'There are no pwm-capable sensor modules installed'

    Im having the same problem buddy.

    I'm following this tutorial for fan control. No luck with pwm though.

  3. #3
    Join Date
    Jan 2012

    Re: 'There are no pwm-capable sensor modules installed'

    Hi guys,

    came across this and thought I'd share it.

    If you are using a PWM capable motherboard with the IT87 module and
    you want to use fancontrol ...

    If you can't load the it87 module - most likely your kernel needs
    as kernel argument. Add it to your boot loader for example.
    Then try
    modprobe it87
    lsmod | grep it87 --> make sure it's loaded
    save configuration, then run
    to make sure everything loads properly.

    Then try
    if pwmconfig gives you:

    There are no pwm-capable sensor modules installed

    You can get it working by loading the it87 module with the command:

    modprobe it87 fix_pwm_polarity=1

    pwmconfig should work as expected.


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