thinkpad ~ $ sudo cat /etc/acpi/events/lid
# Optionally you can specify the placeholder %e. It will pass
# through the whole kernel event message to the program you've
# specified.

event=button/lid LID close
action=/etc/acpi/actions/s2ram.sh %e


thinkpad ~ $ sudo cat /etc/acpi/actions/s2ram.sh
#!/bin/sh

# Suspend to ram when the lid is closed

# First, let's make sure we're not shutting down or rebooting
if [ ! -e /etc/powerdown ]; then
  sync ; sync # Just in case...
  pm-suspend
fi