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ACERHDF(4) Kernel Interfaces Manual ACERHDF(4) NAME acerhdf -- Acer Aspire One fan control 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 sec- onds. 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 12.0 only. The FreeBSD port will most likely support the same range of de- vices as the original Linux version. This is entirely untested how- ever. 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 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. BUGS The system needs to have a hard drive installed, otherwise acerhdf will not work correctly and the system will automatically power down after some time. This behavior is enforced by the BIOS and there is no known workaround. This bug is present in the Linux version as well. SEE ALSO kenv(1), loader.conf(5), sysctl.conf(5) AUTHORS acerhdf was ported from Linux to FreeBSD by Tobias Kortkamp <t@tobik.me>. The original Linux version of this module was written by: Peter Feuerer <peter@pie.net> and Borislav Petkov <bp@alien8.de>. FreeBSD ports 15.0 August 26, 2016 ACERHDF(4)
NAME | DESCRIPTION | SYSCTL VARIABLES | SUPPORTED DEVICES | EXAMPLES | BUGS | SEE ALSO | AUTHORS
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