be enough. Please let me know if you have problem with the
resulting overall behavior.
- * ARGUMENTS
-
- The breezed executable can read a configuration file (which is
- /etc/breezed.conf by default, but that you can specify with
- --configuration-file <file>) or get the various parameters on the
- command line.
-
- The thermal files can be specified either with the --thermal-files
- options on the command line or the thermal_files keyword in the
- configuration file. The provided value should be a comma-separated
- list of filenames. When it want to pool the temperature, the daemon
- will read those files and compute the maximum integer value they
- contains.
-
- The fan file can be specified with either --fan-file or the
- fan_file keyword. The specified file will be used by the daemon to
- control the fan speed by writing "level n" into it.
-
- The temperature thresholds can be specified either with the
- --temperature-thresholds argument, or with the
- temperature_thresholds keyword in the configuration file. The
- provided value should be a comma separated list of integers. The
- first one is actually ignored and forced to -1. Each value states
- which temperature should trigger the given level.
-
- For instance, my X61s has 8 fan levels, from 0 to 7. The thresholds
- I picked are -1,52,54,56,58,60,62,64. Hence, when the temperature
- reaches 52C, the fan is set to level 1, when it reached 54C it is
- set to level 2, etc. The maximum speed level 7 is chosen for any
- temperature equal or greater than 64C. As said above, the
- temperature to decrease the speed has to be two degrees below the
- provided thresholds. Hence, the temperature of my X61s has to go
- down to 50C (52C - 2) for the fan to switch off. Also, the daemon
- waits at least 30s before reducing the speed of the fan.
+ See the man page for details about the arguments and configuration
+ file.
* NOTES
-.TH "BREEZED" "1"
-.SH "NAME"
+.TH "BREEZED" "1"
+.SH "NAME"
breezed - Fan control daemon
-.SH "SYNOPSIS"
-.PP
-\fBbreezed\fP [\fBoptions\fP]
-.SH "DESCRIPTION"
-.PP
-\fBbreezed\fP
-Adjusts the fan speed according to the temperature of the computer.
-.SH "OPTIONS"
-.IP "\fB-h | --help\fP " 10
+.SH "SYNOPSIS"
+.PP
+\fBbreezed\fP [\fBoptions\fP]
+.SH "DESCRIPTION"
+.PP
+\fBbreezed\fP Adjusts the fan speed according to the computer
+temperature. It should be started through the adequate script in
+/etc/rc?.d.
+
+Every 5s, this daemon gathers all integer values from the thermal
+files, and keep the max as the overall computer temperature T. It then
+pick the highest temperature threshold lower than T and set the fan
+speed to the corresponding level. To avoid oscillations, T has to be
+two degrees below threshold to reduce the temperature. Also, the
+daemon waits for at least 30s after any change of the fan speed before
+reducing it. The fan speed is set by writing "level %d" into the
+specified fan file.
+
+Options can not be specified twice, neither on the command line nor in
+the configuration file.
+
+.SH "OPTIONS"
+.IP "\fB-h | --help\fP " 10
display help and exits
.IP "\fB-v | --version\fP " 10
display the version number and exits
.IP "\fB-tt | --temperature-thresholds <temp1>[,temp2]...\fP " 10
set the temperature thresholds.
-.SH "AUTHOR"
-.PP
+.SH "CONFIGURATION FILE"
+
+The configuration file is a succession of lines, each starting with
+one of the three keywords thermal_files, fan_file or
+temperature_thresholds, followed by the same parameter values as for
+the command line arguments. The default configuration file is located
+at /etc/breezed.conf
+
+.SH "EXAMPLES"
+
+A typical way of starting breezed is
+
+breezed --thermal-files /proc/acpi/thermal_zone/THM0/temperature,/proc/acpi/thermal_zone/THM1/temperature \
+ --fan-file /proc/acpi/ibm/fan \
+ --temperature-thresholds -1,52,54,56,58,60,62,64
+
+which specifies that when the temperature raises above 52C, the fan
+level should be 1, when the temperature raises above 54C it should be
+2, etc. The maximum speed level 7 should be chosen for temperature
+above 64C. Due to the two degrees gap between the thresholds to
+increase and thresholds to decrease the temperature, it will for
+instance remains at speed 1 until the temperature goes down to 50C.
+
+Because it takes into account all the values found in the thermal
+files, you can use as well /proc/acpi/thermal_zone/THM?/temperature or
+/proc/acpi/ibm/thermal.
+
+.SH "AUTHOR"
+.PP
Written by Francois Fleuret <francois@fleurer.org>. Permission is
granted to copy, distribute and/or modify this document under the
terms of the GNU GPL.