Description: Measure time that hooks take and print them in the log. Also, disable actual suspend call to make hook optimization/measure turnarounds more convenient. This is not applied by default as the date calls themselves add overhead.
Author: Martin Pitt <martin.pitt@ubuntu.com>

--- old/pm/pm-functions.in
+++ new/pm/pm-functions.in
@@ -196,10 +196,13 @@
 	# $1 = hook to run
 	# rest of args passed to hook unchanged.
 	log "Running hook $*:"
+	t_start=`date +%s.%N`
 	hook_ok "$1" && "$@"
 	# log() changes the return value, so save it for later
 	local status=$?
-	log ""
+	t_end=`date +%s.%N`
+	time=`echo $t_end - $t_start | bc -l`
+	log "($time s)"
 	log -n "$*: " 
 	hook_exit_status $status && LAST_HOOK="${1##*/}" || inhibit
 }
@@ -318,7 +321,8 @@
 if [ -z "$SUSPEND_MODULE" ]; then
 	if grep -q mem /sys/power/state; then
 		SUSPEND_MODULE="kernel"
-		do_suspend() { echo -n "mem" >/sys/power/state; }
+		#do_suspend() { echo -n "mem" >/sys/power/state; }
+		do_suspend() { log "Would suspend now"; }
 	elif [ -c /dev/pmu ] && check_suspend_pmu; then
 		SUSPEND_MODULE="kernel"
 		do_suspend() { do_suspend_pmu; }