NAME

       pwmconfig - tests the PWM outputs of sensors and configures fancontrol

SYNOPSIS

       pwmconfig

WARNING

       pwmconfig will attempt to stop your fans, one at a time, for approximately 5 seconds each.
       This may cause your processor temperature to rise. Verify that all  fans  are  running  at
       normal  speed  after  this  program has exited.  pwmconfig does its best to check that the
       fans are spinning when they are supposed  to,  but  due  to  the  diversity  of  available
       motherboards and fans, it shouldn't be blindly trusted. Always verify by yourself.

       It  is strongly recommended to run pwmconfig at a time when there is no significant system
       load, to minimize the risk of overheating.

DESCRIPTION

       pwmconfig searches your sensors for pulse width modulation (PWM) controls, and tests  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.

       When a connection is established between a PWM control and a fan, pwmconfig can generate a
       detailed correlation, to show how a given fan is responding to various PWM duty cycles.

       Lastly,  pwmconfig  will enter in fancontrol configuration mode (unless you decide to skip
       that part.) In this mode, you are invited to enter several parameters which will determine
       how  the fancontrol daemon regulates the speed of one or more fans in your system based on
       temperature measurements. In particular,  you  will  have  the  opportunity  to  establish
       mappings  between fans and temperature inputs, define the temperature range over which the
       speed of the fan should be adjusted dynamically, the minimum speed at which the fan should
       spin, etc. See fancontrol(8) for additional information.

BUGS

       The  term  "PWM"  is used because most fan control systems in computers are based on pulse
       width modulation. Some motherboards however use DC variation instead. So, the  term  "PWM"
       should  be seen as a generic term for "fan speed control", regardless of the actual method
       used.

SEE ALSO

       fancontrol(8), sensors(1).

AUTHORS

       Marius Reiner <marius.reiner@hdev.de>, Jean Delvare <khali@linux-fr.org>