Why no /etc/acpi ?

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http://forums.fedoraforum.org – I'm using Fedora 12 with LXDE (sudo yum groupinstall LXDE if you want to try it), and while using LXDE rather than GNOME, the power button doesn't do anything. I found a possible solution here: http://forum.lxde.org/viewtopic.php?f=8&t=205 but I have no /etc/acpi/ folder. Why is that? EDIT: Solution: package acpid is needed (HowTos)