Recently, I installed Debian lenny on it to use it as a downloading server. But I had a problem with it’s power off. Though I have issued the command “poweroff”, it didn’t completely power off itself and continued to display a message saying “System has halted.” on the screen. More here
I found the solution to my problem from here after spending days until I have a working one.
There are two main standards for power management schemes: APM and the newer ACPI, both off which support powering down the computer completely.