I´ve got: UNR 9.04, BIOS 0.3310 and I´m not able to run fan control . Firstly I performed these steps (from [URL]https://help.ubuntu.com/community/AspireOne[/URL]): [code](19/02/09) This is an update to the following fan control section below. The user space script "acerfand" originaly used to fix the noisy fan problem can cause race conditions and lockups as it accesses registers asynchronous to the kernel. A kernel module to do the fan control has recently been created and this avoids the race condition problem. You can install the kernel module in the following way. These instructions also work for 8.10. wget [url]http://piie.net/files/acerhdf_kmod-0.4.0.tar.gz[/url] tar zxvf acerhdf_kmod-0.4.0.tar.gz cd acerhdf_kmod make sudo make install Now load the kernel module using modprobe acerhdf[/code] And the segmentation error appears (this the console returns). When I perform well known acerfand trick, my AA1 crashed after couple of minutes (switched off by itself). Note: I changed the content of the file to fit my BIOS version as well. Any suggestion how to operate fan? THX