FC4: Enabling suspend to RAM

I've found another nice Dell D600 FC setup page here. Among other things it has the instructions for setting up S3 mode (suspend to RAM). You can refer to the original page for the instructions, I'm also including my version of these same instructions here for completeness.

To get Hibernate to work you you'll need log in as root (su -) a create a new file /etc/acpi/events/sleep.conf with the following content:

event=button/sleep *
action=/etc/acpi/actions/sleep.sh

You'll also need to create the file /etc/acpi/actions/sleep.sh with:

#!/bin/tcsh
# Script to drive the system to S3
# suspend-to-ram
#
# JRA Jan 2005

# Step 1: preparing sleep
if (-e /suspending) then
echo "already in the process of suspending. Please be patient."
else
/bin/touch /suspending
/usr/bin/killall -s SIGUSR1 cpuspeed
/usr/bin/chvt 1 # necessary to make DRI work
/sbin/service anacron stop
# USB doesn't suspend without unloading first
/sbin/rmmod ehci_hcd
/sbin/rmmod uhci_hcd
#save the system time
/sbin/hwclock --adjust
/sbin/rmmod wacom # only necessary of you have wacom stylus
/sbin/rmmod -as
/bin/sync

# Step 2: send sleep command via ACPI
echo mem > /sys/power/state

# Step 3: wake-up and reload
/sbin/hwclock --hctosys
/sbin/modprobe ehci_hcd
/sbin/modprobe uhci_hcd
# initialise X
xinit /bin/false -- :1
/usr/bin/chvt 7
/sbin/service anacron start
/sbin/service cpuspeed restart
rm /suspending
endif

Make sure that the file is executable (to do this run chmod 700 /etc/acpi/actions/sleep.sh). Finally you'll need to restart the acpi system: service acpid restart.