Lainaus:

---

To set up Laptop Mode on your system, first make sure you have a kernel version that supports it. Laptop Mode is included in Linux 2.6 from version 2.6.6 upward. In the kernel source tree, you can find the documentation for Laptop Mode in Documentation/laptop-mode.txt. Embedded in the documentation is the control script, which you have to extract and save as /sbin/laptop_mode. Give the script execute permissions: chmod 700 /sbin/laptop_mode.

To enable Laptop Mode, run (as root) /sbin/laptop_mode start. This does everything necessary, except it doesn't make your hard drive spin down. To do that, you must set the hard drive's idle timeout using hdparm -S 4 /dev/hda. The value 4 indicates an idle timeout of 20 seconds. If you want to disable Laptop Mode, simply run /sbin/laptop_mode stop.

You probably want to configure Laptop Mode so it starts whenever your laptop runs on batteries. If you have a laptop that supports ACPI, you can set this up like so: extract the files ac_adapter and battery.sh from the Laptop Mode documentation and install them in the indicated locations. Edit battery.sh to configure your hard drive's device name and your preferred idle timeout, and you're ready to roll.

---