root/lm-sensors/branches/lm-sensors-3.0.0/prog/pwm/pwmconfig.8 @ 5344

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Update pwmconfig manual page.

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1.TH PWMCONFIG 8 "September 28, 2008" "lm-sensors 3"
2.SH NAME
3pwmconfig \- tests the PWM outputs of sensors and configures fancontrol
4
5.SH SYNOPSIS
6.B pwmconfig
7
8.SH WARNING
9\fBpwmconfig\fR will attempt to stop your fans, one at a time, for
10approximately 5 seconds each. This may cause your processor
11temperature to rise. Verify that all fans are running at normal speed
12after this program has exited.
13\fBpwmconfig\fR does its best to check that the fans are spinning when
14they are supposed to, but due to the diversity of available
15motherboards and fans, it shouldn't be blindly trusted. Always verify
16by yourself.
17
18It is strongly recommended to run \fBpwmconfig\fR at a time when there
19is no significant system load, to minimize the risk of overheating.
20
21.SH DESCRIPTION
22.B pwmconfig
23searches your sensors for pulse width modulation (PWM)
24controls, and tests each one to see if it controls a fan on
25your motherboard. Note that many motherboards do not have PWM
26circuitry installed, even if your sensor chip supports PWM.
27
28When a connection is established between a PWM control and a fan,
29\fBpwmconfig\fR can generate a detailed correlation, to show how a
30given fan is responding to various PWM duty cycles.
31
32Lastly, \fBpwmconfig\fR will enter in \fBfancontrol\fR configuration
33mode (unless you decide to skip that part.) In this mode, you are
34invited to enter several parameters which will determine how the
35\fBfancontrol\fR daemon regulates the speed of one or more fans in
36your system based on temperature measurements. In particular, you will
37have the opportunity to establish mappings between fans and
38temperature inputs, define the temperature range over which the speed
39of the fan should be adjusted dynamically, the minimum speed at which
40the fan should spin, etc. See fancontrol(8) for additional
41information.
42
43.SH BUGS
44The term "PWM" is used because most fan control systems in computers
45are based on pulse width modulation. Some motherboards however use DC
46variation instead. So, the term "PWM" should be seen as a generic term
47for "fan speed control", regardless of the actual method used.
48
49.SH SEE ALSO
50fancontrol(8), sensors(1).
51
52.SH AUTHORS
53.PP
54Marius Reiner <marius.reiner@hdev.de>,
55Jean Delvare <khali@linux-fr.org>
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