Hi,
this is my current implementation of userspace suspend support (with
automatic fallback if it is not available).
There is a second feature in there, around the $INHIBIT variable: it allows
a hook to prevent suspending. Right now i do this if i notice that the
currently running kernel is not available for resume (after a kernel update
but before the reboot, for example). If i know in advance that i will not
be able to resume, it does not make sense trying to suspend :-). Any hook
wanting to prevent suspend just has to "touch $INHIBIT" or "echo 'reason
why we cannot suspend' >> $INHIBIT".
Index: pm/functions
===================================================================
RCS file: /cvs/pm-utils/pm-utils/pm/functions,v
retrieving revision 1.26
diff -u -p -r1.26 functions
--- pm/functions 30 Oct 2006 15:40:42 -0000 1.26
+++ pm/functions 30 Oct 2006 21:20:36 -0000
@@ -4,9 +4,13 @@ export PATH=/sbin:/usr/sbin:/bin:/usr/bi
# default values go here
HIBERNATE_RESUME_POST_VIDEO=no
+HIBERNATE_METHOD=""
SUSPEND_MODULES=""
RESUME_MODULES=""
PM_LOGFILE=${PM_LOGFILE:=/var/log/pm-suspend.log}
+INHIBIT=/var/run/pm-utils.inhibit
+S2DISK_BIN=/usr/sbin/s2disk
+S2DISK_CONF=/etc/suspend.conf
[ -f /etc/pm/config ] && . /etc/pm/config
@@ -18,9 +22,13 @@ add_global() {
# export them all here
add_global HIBERNATE_RESUME_POST_VIDEO
+add_global HIBERNATE_METHOD
add_global SUSPEND_MODULES
add_global RESUME_MODULES
add_global PM_LOGFILE
+add_global INHIBIT
+add_global S2DISK_BIN
+add_global S2DISK_CONF
source_configs()
{
@@ -113,6 +121,35 @@ get_power_status()
return $RETVAL
}
+do_suspend()
+{
+ if [ -x /usr/sbin/s2ram ]; then
+ /usr/sbin/s2ram $S2RAM_OPTS
+ else
+ echo -n "mem" > /sys/power/state
+ fi
+}
+
+do_hibernate()
+{
+ if [ -z "$HIBERNATE_METHOD" ]; then
+ if [ -x $S2DISK_BIN -a -c /dev/snapshot ]; then
+ HIBERNATE_METHOD="userspace"
+ else
+ HIBERNATE_METHOD="kernel"
+ fi
+ fi
+ case $HIBERNATE_METHOD in
+ userspace)
+ $S2DISK_BIN -f $S2DISK_CONF
+ ;;
+ kernel)
+ echo -n "platform" > /sys/power/disk
+ echo -n "disk" > /sys/power/state
+ ;;
+ esac
+}
+
pm_main()
{
if [ -n "$PM_LOGFILE" ]; then
@@ -120,17 +157,23 @@ pm_main()
exec > "$PM_LOGFILE" 2>&1
fi
take_suspend_lock || exit 1
+
+ rm -f $INHIBIT
+
run_hooks "$1"
sync ; sync ; sync
case "$1" in
suspend)
- pm-pmu --suspend || echo -n "mem" > /sys/power/state
+ if [ ! -e $INHIBIT ]; then
+ pm-pmu --suspend || do_suspend
+ fi
run_hooks resume reverse
;;
hibernate)
- echo -n "platform" > /sys/power/disk
- echo -n "disk" > /sys/power/state
+ if [ ! -e $INHIBIT ]; then
+ do_hibernate
+ fi
run_hooks thaw reverse
;;
esac
--
Stefan Seyfried
QA / R&D Team Mobile Devices | "Any ideas, John?"
SUSE LINUX Products GmbH, Nürnberg | "Well, surrounding them's out."
_______________________________________________
Pm-utils mailing list
[email protected]
http://lists.freedesktop.org/mailman/listinfo/pm-utils
