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Man Pages


Manual Reference Pages  -  ACERHDF (4)

NAME

acerhdf - Acer Aspire One fan control

CONTENTS

Description
Sysctl Variables
Supported Devices
Examples
See Also
Authors

DESCRIPTION

The acerhdf driver allows you to control the fans of some of the Acer Aspire One netbook models, so that they are not constantly running. Other netbooks might be supported as well. See SUPPORTED DEVICES for more details. It is a port of the Linux kernel module with the same name.

acerhdf monitors the system temperature and turns the fan on if it is above the fan-on threshold, and turns it off again if the temperature drops below the fan-off threshold.

SYSCTL VARIABLES

dev.acerhdf.0.enabled
  Set to 1, if acerhdf should start controlling the fan. Defaults to 0, which means acerhdf is not in control of the fan.
dev.acerhdf.0.fanon
  The temperature at which the fan should be turned on. Defaults to 60.
dev.acerhdf.0.fanoff
  The temperature at which the fan should be turned off again. Defaults to 53.
dev.acerhdf.0.fanstate
  Read-only. Returns the current fan state, auto if the fan is running or off.
dev.acerhdf.0.interval
  Seconds to wait between temperature polls. Defaults to 5 seconds.
dev.acerhdf.0.temperature
  Read-only. The current system temperature in degree Celsius.

SUPPORTED DEVICES

acerhdf was tested on an Acer Aspire One A150 running FreeBSD 10.1. The FreeBSD port will most likely support the same range of devices as the original Linux version. Support also depends on the BIOS version of your computer. Please refer to the source code for the BIOS versions that are supported for your particular device.

Acer AO521
Acer AO531h
Acer AO751h
Acer Aspire 1410
Acer Aspire 1810T
Acer Aspire 1810TZ
Acer Aspire 1825PTZ
Acer Aspire 5315
Acer Aspire 5739G
Acer Aspire 5755G
Acer Aspire One 753
Acer Aspire One A110
Acer Aspire One A150
Acer Extensa 5420
Acer LT-10Q
Acer TM8573T
Acer TravelMate 7730G
Gateway AOA110
Gateway AOA150
Gateway LT31
Packard Bell AOA110
Packard Bell AOA150
Packard Bell DOA150
Packard Bell DOTMA
Packard Bell DOTMU
Packard Bell DOTVR46
Packard Bell ENBFT
 

To determine your BIOS version run:

kenv smbios.bios.version

EXAMPLES

To enable acerhdf make sure it is installed in /boot/modules and add the following settings to your /boot/loader.conf:
acerhdf_load="YES"

and your /etc/sysctl.conf:

dev.acerhdf.0.enabled=1

You may want to adjust the fan-on and fan-off thresholds as well.

SEE ALSO

acpi(4), kenv(1), sysctl.conf(5),

AUTHORS


.An -nosplit acerhdf was ported from Linux to FreeBSD by Tobias Kortkamp <tobias.kortkamp@gmail.com>.

The original Linux version of this module was written by:
.An Peter Feuerer Aq peter@pie.net and
.An Borislav Petkov Aq bp@alien8.de .

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