Hi, the version (0.5) in the slackbuildscript of acpitool is no longer available. I suggest to use the newer 0.5.1 version and this download link: http://sourceforge.net/projects/acpitool/files/acpitool/0.5.1/acpitool-0.5.1.tar.bz2/download I tested this and it compiles on my machine. greetings, Felix