Hi all,
Under Ubuntu 9.04 Netbook Remix my Aspire One has its fan always on, this generates two problems, the first one is linked to the power consumption (the fan reduce the battery autonomy) and the second one is the noise (the fan isvery noisy).
I've solved this problem installing acerhdf module, this little module give you the control of the fan over the Aspire One.
To install it you shall execute the following commands in a termial window:
# sudo apt-get install build-essential linux-kernel-headers
# wget http://piie.net/files/acerhdf_kmod-0.4.0.tar.gz
# tar zxvf acerhdf_kmod-0.4.0.tar.gz
# cd acerhdf_kmod
# make && sudo make install
# sudo modprobe acerhdf
To startup this module at each boot of your Aspire One you shall modify two configuration files executing the following commands:
# sudo echo "acerhdf" >> /etc/modules
# sudo echo "options acerhdf interval=10, fanon=67, fanoff=62" >> /etc/modprobe.d/options
# sudo echo "options acerhdf interval=10 fanon=67 fanoff=62" >> /etc/modprobe.d/options
The first command puts the acerhdf module in the list of modules that will be loaded at boot time, the second command sets up the options for the module: interval is the time period between two checks of the temperature (in secs), fanon is the value of temperature to start the fan, fanoff is the value of temperature to stop the fan.
Note that playing with temperature could be very dangerous so use these information at your own risk.
To have more datails refer to the acerhdf offical page.
GG1