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)