Acer Aspire One temperature and fan driver

modulename: acerhdf.ko

configname: CONFIG_ACERHDF

Linux Kernel Configuration
└─>Device Drivers
└─>X86 Platform Specific Device Drivers
└─>Generic Thermal sysfs driver
└─>Acer Aspire One temperature and fan driver
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
This is a driver for Acer Aspire One netbooks. It allows to access
the temperature sensor and to control the fan.

After loading this driver the BIOS is still in control of the fan.
To let the kernel handle the fan, do:
echo -n enabled > /sys/class/thermal/thermal_zone0/mode

For more information about this driver see

If you have an Acer Aspire One netbook, say Y or M

source code: