sudo sh

cat <<. >/etc/acpi/lidbtn.sh
#!/bin/sh
# Initiate suspend mode when the lid has been closed.

# Only act on a lid close event
if grep -q open /proc/acpi/button/lid/LID0/state
then
    dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1 "org.freedesktop.login1.Manager.Suspend" boolean:true
fi
.

cat <<. >/etc/acpi/events/lidbtn
# Laptop lid event triggered.  Call /etc/acpi/lidbtn.sh

event=button[ /]lid
action=/etc/acpi/lidbtn.sh
.

exit