Comment 22 for bug 475641

I was able to use pwmconfig on lucid (10.04) with no problems after I loaded the modules sensor-detect recommends.

manjo@hungry:~/devel/ubuntu/kernel$ sudo modprobe adt7473
manjo@hungry:~/devel/ubuntu/kernel$ sudo modprobe coretemp
manjo@hungry:~/devel/ubuntu/kernel$ sudo modprobe f71882fg
manjo@hungry:~/devel/ubuntu/kernel$ sudo pwmconfig
# pwmconfig revision 5770 (2009-09-16)
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.

Found the following devices:
   hwmon0/device is coretemp
   hwmon1/device is coretemp
   hwmon2/device is coretemp
   hwmon3/device is coretemp
   hwmon4/device is f8000

Found the following PWM controls:
   hwmon4/device/pwm1
hwmon4/device/pwm1 is currently setup for automatic speed control.
In general, automatic mode is preferred over manual mode, as
it is more efficient and it reacts faster. Are you sure that
you want to setup this output for manual control? (n)
   hwmon4/device/pwm2
hwmon4/device/pwm2 is currently setup for automatic speed control.
In general, automatic mode is preferred over manual mode, as
it is more efficient and it reacts faster. Are you sure that
you want to setup this output for manual control? (n)
   hwmon4/device/pwm3
hwmon4/device/pwm3 is currently setup for automatic speed control.
In general, automatic mode is preferred over manual mode, as
it is more efficient and it reacts faster. Are you sure that
you want to setup this output for manual control? (n)
There are no usable PWM outputs.
manjo@hungry:~/devel/ubuntu/kernel$