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thinkfan(1) [debian man page]

THINKFAN(1)							     thinkfan							       THINKFAN(1)

NAME

       thinkfan - A simple fan control program

SYNOPSIS

       thinkfan [-hnqzD [-b BIAS] [-c CONFIG] [-s SECONDS] [-p [DELAY]]]

DESCRIPTION

       Thinkfan  can  use  temperature	inputs	and  one  PWM control file in /sys/class/hwmon or the Thinkpad-specific thinkpad_acpi interface in
       /proc/acpi/ibm. If nothing is specified, it tries to use /proc/acpi/ibm.

       WARNING: This program does only very basic sanity checking on the configuration. That means that you can set  your  temperature	limits	as
	      insane as you like.

       Thinkfan has two modes of operation:

   SIMPLE MODE
       In  simple  mode,  it  uses  only  the highest temperature found in the system. That may be dangerous, e.g. for hard disks.  That's why you
       should provide a correction value (i.e. add 10-15 [u00B0]C) for the sensor that has the temperature of your hard disk (or battery...). See
       the example config files for details about that.

   COMPLEX MODE
       In  complex mode, temperature limits are defined for each sensor thinkfan knows about. Setting suitable limits for each sensor in your sys-
       tem will probably require a bit of experimentation and good knowledge about your hardware, but it's the safest way of keeping  each  compo-
       nent  within  its  specified temperature range. See http://www.thinkwiki.org/wiki/Thermal_Sensors for details on which sensor measures what
       temperature in a Thinkpad. On other systems you'll have to find out on your own. See the example configs to learn about the syntax.

CONFIGURATION

       Some example configurations are provided with the source package. For detailed explanations please read the README file. If  you  installed
       thinkfan from a distribution package, you may find them under /usr/share/doc or wherever your package manager puts documentation.

OPTIONS

       -h     Show a short help message

       -s     Maximum seconds between temperature updates (default: 5)

       -b     Floating point number (0 ~ 20) to control rising temperature exaggeration (see README for why this is needed). Default 5.0

       -c     Load different configuration file (default: /etc/thinkfan.conf)

       -n     Do not become a daemon, log to both terminal and syslog

       -q     Be quiet (no status info on terminal)

       -z     Assume we don't have to worry about resuming from standby when using the sysfs interface (see README!)

       -p     Use  the	pulsing-fan  workaround  (for  older  Thinkpads). Takes an optional floating-point argument (0-10s) as depulsing duration.
	      Default 0.5s.

       -D     DANGEROUS mode: Disable all sanity checks. May damage your hardware!!

BUGS

       If you have any problems with thinkfan, please go to the help forum at sf.net: http://sourceforge.net/projects/thinkfan/forums/forum/905019

thinkfan 0.8							   October 2011 						       THINKFAN(1)

Check Out this Related Man Page

PWMCONFIG(8)						      System Manager's Manual						      PWMCONFIG(8)

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  mother-
       board. 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 tempera-
       ture measurements. In particular, you will have the opportunity to establish mappings between fans and temperature inputs, define the  tem-
       perature  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>

lm-sensors 3							September 28, 2008						      PWMCONFIG(8)
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