Breezed is a small daemon to control the speed of the fan,
- depending on the current temperature of the computer. I have tested
- it only on a Thinkpad X61s.
+ depending on the current temperature of the computer.
- * INSTALLATION
-
- You can install it simply by running as root
-
- ./install.sh
-
- and de-install it with
+ DISCLAIMER: I have tested it only on my Thinkpads (X61s, T420s, and
+ T450s) with Debian stable.
- ./remove.sh
-
- You must have a configuration file in /etc/breezed.conf. Only one
- is currently provided in the archive, and it corresponds to the
- settings _I_ picked for _my_ Lenovo X61s.
-
- I have no idea if these settings are safe on this laptop (I guess
- so, since I have been using them for a few months now and it works
- perfectly), and I suspect they are not safe for another laptop.
+ * INSTALLATION
- * ALGORITHM
+ Before installing, you must have a configuration file in
+ /etc/breezed.conf.
- Breezed scans the temperatures every 5s and sets the fan speed
- according to a series of thresholds.
+ Three configuration files are provided, and correspond to the
+ settings *I* picked for my Lenovo Thinkpads. I guess they are okay
+ on these machines since I have been using them for years without
+ any particular problems, but I have no idea how this translates to
+ other laptops.
- Unfortunately, if the fan speed is set directly according to these
- temperature thresholds, it creates oscillations: The fan goes up,
- temperature goes down, hence fan goes down, temperature goes up,
- etc.
+ If you want to give it a try, just copy of the configuration file,
+ e.g.
- To mitigate such phenomenons, the daemon waits at least 30s after
- the last change before reducing the fan speed, and the actual
- thresholds to decrease the fan speed are two degrees below the
- provided thresholds, which are used when increasing the fan
- speed. This creates a stability area of two degrees, which seems to
- be enough. Please let me know if you have problem with the
- resulting overall behavior.
+ cp breezed_Lenovo_X61s.conf /etc/breezed.conf
- * ARGUMENTS
+ Then install the daemon on a systemd machine simply with
- 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.
+ make install
- 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.
+ and uninstall it with
- 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.
+ make uninstall
- 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.
+ Use respectively install-sysv and uninstall-sysv to install it
+ through /etc/init.d.
- 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 algorithm, arguments and
+ configuration file.
* NOTES
- I wrote this daemon for my personal usage on a X61s, and using it
- may damage your hardware.
-
On Thinkpads you have to allow the module thinkpad_acpi to set the
- fan speed, which is not allowed by default in Debian. To do so, you
- have to have a file /etc/modprobe.d/thinkpad_acpi.modprobe
- containing
+ fan speed, which is not allowed by default in Debian. To do so, add
+ a file /etc/modprobe.d/thinkpad_acpi.conf containing
---------------------------- snip snip -------------------------------
options thinkpad_acpi fan_control=1
--
Francois Fleuret (francois@fleuret.org)
-December 2008
+Aug 2016
projects / breezed.git / blobdiff