How to go automatically from Suspend into Hibernate?

Is it possible to make Ubuntu go into Hibernate state from Suspend, aka "Suspend Sedation"?

What I am looking for is this:
When I close the lid, the laptop is put into Suspend. Then, after a pre-determined time (even if the battery is going strong) if I still don't use it, it should put itself into a Hibernate to save battery power.

For example, my laptop is set up to go into a Suspend once I close the lid. If then I don't use it for entire day, the battery goes flat, because even in suspend mode the hardware still consumes a small amount of power, and the battery eventually discharges. What I want is to be able to tell Ubuntu that even if it is suspended, it still needs to go into Hibernate after some hours of inactivity.

Windows can do that. Ubuntu can be programmed to go into Standby or Hibernate on timer, but not both.

• In my research I found the same Linux Mint thread, but "Suspend Sedation" is not an official Microsoft term for that feature and as far as I can tell was invented by the Linux Mint forum user who mentioned it. – ayan4m1 Nov 10 '10 at 20:43
• Is there a better name for that feature? – Sergey Stadnik Nov 11 '10 at 2:01
• As far as I can tell, there is no universally accepted name for the feature. "Hybrid suspend" is used by some, "suspend sedation" is used by that one Linux Mint forum user, and I've heard "hibernate and suspend" used to refer to the process before. Microsoft officially refers to it as "hybrid sleep," for Windows 7 at least. – ayan4m1 Nov 11 '10 at 13:16
• @ayan4m1 I realise this is an old question, but I think it is important to clarify this. Hyrbid sleep is not the same as "Sleep then hibernate after a specified time". Hybrid sleep simply becomes hibernate when power is lost, through battery running out. The behaviour described by the OP does not require Hybrid Sleep to be enabled. – Paul Dec 9 '11 at 2:51

In Ubuntu 18.04 it much more easier. In systemd is available a new mode suspend-then-hibernate. To start using this function you need to create a file /etc/systemd/sleep.conf with the next content:

[Sleep]
HibernateDelaySec=3600


Then you can test it by command:

sudo systemctl suspend-then-hibernate


you can edit HibernateDelaySec to reduce delay to hibernate.

If all works fine you can change Lid Close Action, to do it you need to edit the file /etc/systemd/logind.conf

You need to find option HandleLidSwitch=, uncomment it and change to HandleLidSwitch=suspend-then-hibernate. Then you need to restart systemd-logind service (warning! you user session will be restarted) by the next command:

sudo systemctl restart systemd-logind.service


That's all! Now you can use this nice function.

• This was spot on. Using it on Pop!_OS 18.10 (aka Ubuntu 18.10). – eduncan911 Jan 27 at 4:44
• Brilliant thank you! Does sleep.conf affect the hibernate mode in some way too, or does it only affect suspend-then-hibernate? – user2428107 Feb 27 at 6:01
• @user2428107 you can read about options in manual systutorials.com/docs/linux/man/5-systemd-sleep – PRIHLOP Feb 27 at 6:12

The solution to this is simple. First, upon suspend and resume, the pm-suspend program executes a series of scripts in /etc/pm/sleep.d and /usr/lib/pm-utils/sleep.d. So my solution is to add a script that does the following:

1. Upon suspend, record the current time and register a wakeup event using rtcwake.
2. Upon resume,check the current time against the recorded time from above. If enough time has elapsed, then we probably woke up due to the rtc timer event. Otherwise we woke up early due to a user event (such as opening the laptop screen).
3. If we woke up due to the rtc timer, then immediately issue a "pm-hibernate" command to go into hibernation.

Here is a script that does this. Name it 0000rtchibernate and place it in the /etc/pm/sleep.d directory (the 0000 is important, so that the script executes first on suspend, and last on resume).

#!/bin/bash
# Script name: /etc/pm/sleep.d/0000rtchibernate
# Purpose: Auto hibernates after a period of sleep
# Edit the "autohibernate" variable below to set the number of seconds to sleep.
curtime=$(date +%s) autohibernate=7200 echo "$curtime $1" >>/tmp/autohibernate.log if [ "$1" = "suspend" ]
then
# Suspending.  Record current time, and set a wake up timer.
echo "$curtime" >/var/run/pm-utils/locks/rtchibernate.lock rtcwake -m no -s$autohibernate
fi

if [ "$1" = "resume" ] then # Coming out of sleep sustime=$(cat /var/run/pm-utils/locks/rtchibernate.lock)
rm /var/run/pm-utils/locks/rtchibernate.lock
# Did we wake up due to the rtc timer above?
if [ $(($curtime - $sustime)) -ge$autohibernate ]
then
# Then hibernate
rm /var/run/pm-utils/locks/pm-suspend.lock
/usr/sbin/pm-hibernate
else
# Otherwise cancel the rtc timer and wake up normally.
rtcwake -m no -s 1
fi
fi


Hopefully this code comes through on this message board (this is my first post here).

Edit the timeout value autohibernate=7200 at the top, to however many seconds you which to sleep before going into hibernation. The current value above is 2 hours. Note, that you laptop WILL wake up at that time for a few seconds, while it is executing the hibernate function.

So if you plan on putting your laptop in a case, don't suspend, but hibernate instead. Otherwise your laptop could overheat in esp. if it is in a tight fitting slip case (although it will only be on for a few seconds to a minute).

I've been using this method for the past couple of days, so far it has been successful (and saved me from a dead battery this afternoon). Enjoy.

For other Linux distributions that use systemd and newer Ubuntu versions this should still work if you place the script in /usr/lib/systemd/system-sleep instead of /etc/pm/sleep.d. Also, replace the /usr/sbin/pm-hibernate command with systemctl hibernate.

• It has worked here, but only after I chmoded the file to add X to everyone. I am a huge newbie and it took me 2 days to figure out. Very good script and I hope this helps whoever might be having problems. Thank you. – user52343 Mar 29 '12 at 17:27
• This would make a useful Ubuntu/Debian package! – Petr Pudlák Dec 10 '12 at 8:26
• Just wondering: would this still be valid for Ubuntu 13.04? I need exactly this solution but I don't want to mess with wife's laptop if it turns out to break things on newer versions. – Torben Gundtofte-Bruun Sep 17 '13 at 6:33
• Thanks for the script. Works fine for me on Ubuntu 14.04! One improvement would be if when the laptop wakes up to hibernate, it could check to see if it is plugged into AC power. If so, I would want it to suspend again instead of hibernating. Restoring from hibernate takes longer and I don't really need it to hibernate when it is plugged in... – maddentim Jun 6 '14 at 14:19
• Thank you so much!!!! This script is magic I was dreaming of!! – yanpas Aug 10 '15 at 20:42

To explain how this works (this is similar to Windows) in simple words: the machine doesn't wake up from standby when battery gets low to be able to save the machine state to the swap partition, it saves everything to the swap partition immediately on standby, and when the battery runs out, it will recover from that by loading the state from the swap partition (as it would do in case you hibernated).

AFAIK linux will/should use hybrid standby/hibernate instead of "normal" standby if it knows that it works for your hardware. It's also possible that this is disabled currently because of too many bugs or something... ;)

If you like experimenting, maybe you can see if you can get any good results with pm-suspend-hybrid.

If the following says you're lucky, then in theory hybrid suspend is supported on your system:

pm-is-supported --suspend-hybrid && echo "you're lucky"

• The single apostrophe in your shell command could be misleading and confusing... please escape it. – ayan4m1 Nov 11 '10 at 17:49
• Bah, that's what happens when you edit a commandline embeded inside other text, without thinking about it as a commandline... Thanks & Fixed. – JanC Nov 12 '10 at 3:44
• No problem, yeah understood about the different headspaces for the two processes. – ayan4m1 Nov 12 '10 at 5:40

You may be interested in s2both. It is provided by the package uswsusp in Ubuntu 10.10. It suspends to disk, but instead of shutting down the system instead puts it in S3, which is the power mode usually associated with the "Suspend" option in Ubuntu. pm-suspend-hybrid is another tool that purports to do the same thing.

To make this automated on lid close, take a look at the following guide which allows you to run an arbitrary script when a lid event is caught:

If you happen to have a ThinkPad, the manpage for tpctl makes reference to an argument, --pm-sedation-hibernate-from-suspend-timer, which seems to provide the feature you're looking for. I would caution you against trying this on non-ThinkPad hardware.

For reference, I looked through the manpage for hibernate.conf; it didn't seem to have any relevant options but might be worth a second reading.

Ubuntu 16.04 - from suspend/sleep into hibernate after a pre-determined time

It seems that on Ubuntu 16.04 things are a little different, so steps I took to make it work were:

1. Make sure hibernate is working as expected when running

systemctl hibernate

2. Copy the original suspend.target file:

sudo cp /lib/systemd/system/suspend.target /etc/systemd/system/suspend.target


Then edit the file /etc/systemd/system/suspend.target and add the line:

Requires=delayed-hibernation.service


to the [Unit] section of that file.

3. Create the file /etc/systemd/system/delayed-hibernation.service with the following content:

[Unit]
Description=Delayed hibernation trigger
Before=suspend.target
Conflicts=hibernate.target hybrid-suspend.target
StopWhenUnneeded=true

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/bin/delayed-hibernation.sh pre suspend
ExecStop=/usr/local/bin/delayed-hibernation.sh post suspend

[Install]
WantedBy=sleep.target

1. Create the configuration file  /etc/delayed-hibernation.conf for the script with the following content:
# Configuration file for 'delayed-hibernation.sh' script

# Specify the time in seconds to spend in sleep mode before the computer hibernates
TIMEOUT=1200  #in seconds, gives 20 minutes

1. Create the script which will actually does the hard work.

Create file /usr/local/bin/delayed-hibernation.sh with the content:

#!/bin/bash
# Script name: delayed-hibernation.sh
# Purpose: Auto hibernates after a period of sleep
# Edit the TIMEOUT variable in the $hibernation_conf file to set the number of seconds to sleep. hibernation_lock='/var/run/delayed-hibernation.lock' hibernation_fail='/var/run/delayed-hibernation.fail' hibernation_conf='/etc/delayed-hibernation.conf' # Checking the configuration file if [ ! -f$hibernation_conf ]; then
echo "Missing configuration file ('$hibernation_conf'), aborting." exit 1 fi hibernation_timeout=$(grep "^[^#]" $hibernation_conf | grep "TIMEOUT=" | awk -F'=' '{ print$2 }' | awk -F'#' '{print $1}' | tr -d '[[ \t]]') if [ "$hibernation_timeout" = "" ]; then
echo "Missing 'TIMEOUT' parameter from configuration file ('$hibernation_conf'), aborting." exit 1 elif [[ ! "$hibernation_timeout" =~ ^[0-9]+$]]; then echo "Bad 'TIMEOUT' parameter ('$hibernation_timeout') in configuration file ('$hibernation_conf'), expected number of seconds, aborting." exit 1 fi # Processing given parameters if [ "$2" = "suspend" ]; then
curtime=$(date +%s) if [ "$1" = "pre" ]; then
if [ -f $hibernation_fail ]; then echo "Failed hibernation detected, skipping setting RTC wakeup timer." else echo "Suspend detected. Recording time, set RTC timer" echo "$curtime" > $hibernation_lock rtcwake -m no -s$hibernation_timeout
fi
elif [ "$1" = "post" ]; then if [ -f$hibernation_fail ]; then
rm $hibernation_fail fi if [ -f$hibernation_lock ]; then
sustime=$(cat$hibernation_lock)
rm $hibernation_lock if [$(($curtime -$sustime)) -ge $hibernation_timeout ]; then echo "Automatic resume from suspend detected. Hibernating..." systemctl hibernate if [$? -ne 0 ]; then
echo "Automatic hibernation failed. Trying to suspend instead."
touch $hibernation_fail systemctl suspend if [$? -ne 0 ]; then
echo "Automatic hibernation and suspend failover failed. Nothing else to try."
fi
fi
else
echo "Manual resume from suspend detected. Clearing RTC timer"
rtcwake -m disable
fi
else
echo "File '$hibernation_lock' was not found, nothing to do" fi else echo "Unrecognised first parameter: '$1', expected 'pre' or 'post'"
fi
else
echo "This script is intended to be run by systemctl delayed-hibernation.service (expected second parameter: 'suspend')"
fi

1. Make the script executable:
chmod 755 /usr/local/bin/delayed-hibernation.sh


It took me quite a lot until writing this script based on other replies in this thread, things I found on the internet like https://bbs.archlinux.org/viewtopic.php?pid=1554259

My version of the script tries to deal with many problems like go into suspend again if hibernate was not successful but do not wake again after the pre-determined time over and over.

1. Final step I assume would be to just execute

sudo systemctl daemon-reload
sudo systemctl enable delayed-hibernation.service


to make sure new service/configurations are being used.

To check the service log, you can use:

sudo systemctl status delayed-hibernation.service

or for a complete log of the service use:

sudo journalctl -u delayed-hibernation.service

A normal log I get from the running service is:

mile@mile-ThinkPad:~$sudo systemctl status delayed-hibernation.service ● delayed-hibernation.service - Delayed hibernation trigger Loaded: loaded (/etc/systemd/system/delayed-hibernation.service; enabled; vendor preset: enabled) Active: inactive (dead) Jun 09 20:35:42 mile-ThinkPad systemd[1]: Starting Delayed hibernation trigger... Jun 09 20:35:42 mile-ThinkPad delayed-hibernation.sh[2933]: Suspend detected. Recording time, set RTC timer Jun 09 20:35:42 mile-ThinkPad delayed-hibernation.sh[2933]: rtcwake: assuming RTC uses UTC ... Jun 09 20:35:42 mile-ThinkPad delayed-hibernation.sh[2933]: rtcwake: wakeup using /dev/rtc0 at Thu Jun 9 18:55:43 2016 Jun 09 20:55:44 mile-ThinkPad systemd[1]: Started Delayed hibernation trigger. Jun 09 20:55:44 mile-ThinkPad systemd[1]: delayed-hibernation.service: Unit not needed anymore. Stopping. Jun 09 20:55:44 mile-ThinkPad systemd[1]: Stopping Delayed hibernation trigger... Jun 09 20:55:44 mile-ThinkPad delayed-hibernation.sh[3093]: Automatic resume from suspend detected. Hibernating... Jun 09 20:55:44 mile-ThinkPad systemd[1]: Stopped Delayed hibernation trigger. mile@mile-ThinkPad:~$


So This would be it, I hope it really helps someone since I spent days trying to figure out the right combination of configurations and script versions to make this handy feature work.

• Thanks for the answer, this still works like a charm on Ubuntu 18.04. I couldn't get the above answers to work, executing /bin/systemctl hibernate would always return 1 when running in the systemd script, even though it works fine on the command line. – eugenhu May 28 '18 at 6:21

Just in case something goes wrong during pm-hibernate i'd rather put the computer to suspend than let it run. So you can use:

   ...
/usr/sbin/pm-hibernate || /usr/sbin/pm-suspend
...


Here's an updated version of Derek Pressnall's answer that works with systemd and includes Eliah Kagan's suggestion, just drop it in /usr/lib/systemd/system-sleep/delayed_hibernation.sh and make it executable:

#!/bin/bash

hibernation_timeout=1800  #30 minutes

if [ "$2" = "suspend" ]; then curtime=$(date +%s)
if [ "$1" = "pre" ]; then echo -e "[($curtime) $@]\nExecuting pre-suspend hook..." >> /tmp/delayed_hibernation.log echo "$curtime" > /var/run/delayed_hibernation.lock
rtcwake -m no -s $hibernation_timeout elif [ "$1" = "post" ]; then
echo -e "[($curtime)$@]\nExecuting post-suspend hook..." >> /tmp/delayed_hibernation.log
sustime=$(cat /var/run/delayed_hibernation.lock) if [$(($curtime -$sustime)) -ge $hibernation_timeout ]; then echo -e "Automatic resume detected, hibernating.\n" >> /tmp/delayed_hibernation.log systemctl hibernate || systemctl suspend else echo -e "Manual resume detected, clearing RTC alarm.\n" >> /tmp/delayed_hibernation.log rtcwake -m no -s 1 fi rm /var/run/delayed_hibernation.lock fi fi  • This was working great for several months on 15.10 but something about 16.04 prevents it from hibernating even though the script still runs. – Sean Apr 23 '16 at 17:44 • @Sean have you tried the workaround in this thread? – Niccolò Maggioni Apr 24 '16 at 11:00 • Thanks for pointing me in the right direction. I created a systemd service (/etc/systemd/system/delayed-hibernation.service) that referenced the script above then modified /etc/systemd/system/suspend.target to require delayed-hibernation.service. – Sean Apr 24 '16 at 22:02 Here is my recipe (tested it on two notebooks Ubuntu 16.04): Put this script whereever you like (I put it to root, /syspend.sh) and make it executable (chmod +x /suspend.sh) TIMELOG=/tmp/autohibernate.log ALARM=$(tail -n 1 $TIMELOG) SLEEPTIME=5000 #edit this line to change timer, e.g. 2 hours "$((2*60*60))"
if [[ $1 == "resume" ]] then if [[$(date +%s) -ge $(($ALARM + $SLEEPTIME )) ]] then echo "hibernate triggered$(date +%H:%M:%S)">>$TIMELOG systemctl hibernate 2>>$TIMELOG
else
echo "normal wakeup $(date +%H:%M:%S)">>$TIMELOG
fi
elif [[ $1 == "suspend" ]] then echo "$(date +%s)" >> $TIMELOG rtcwake -m no -s$SLEEPTIME
fi


Then create systemd target: # touch /etc/systemd/system/suspend-to-sleep.target Paste this content:

#/etc/systemd/system/suspend-to-hibernate.service
[Unit]
Description=Delayed hibernation trigger
Before=suspend.target
Conflicts=hibernate.target hybrid-suspend.target
StopWhenUnneeded=true

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/bash /suspend.sh suspend
ExecStop=/bin/bash /suspend.sh wakeup

[Install]
WantedBy=sleep.target
RequiredBy=suspend.target


Then enable it # systemctl enable suspend-to-sleep.target.

I've faced an issue on the one of notebooks: closing lid didn't trigger this target. This was due to xfce4-power-manager. There are two ways to workaround this problem. The first one is to edit /etc/systemd/logind.conf file and replace HandleLidSwitch=ignore with HandleLidSwitch=suspend. But it will be systemwide, so I just added symlink to my script # ln -s /suspend.sh /etc/pm/sleep.d/0000rtchibernate

Another more common workaround you can use hybrid-sleep (like the Mac OS does). If your computer supports hibernation, you can use this feature:

systemctl hybrid-sleep


That command should suspend and send to disk (hibernate) the computer. After some time the computer will turn off (when turning on, it will use the hibernation files to wake up).

p.s.: I know it's not exactly what the OP posted, but it's fairly close

Don't forget to chmod +x that file, make it executable.

There's another solution without rtcwake, using wakealarm in /sys/class/rtc/rtc0. Make use obsolete code in pm-functions (/usr/lib/pm-utils) after the comments #since the kernel does not directly support ... , ('cos the current kernel (after 3.6 something) does directly support). Revert that code and put in do_suspend() part instead of do_suspend_hybrid().

Obsolete code (suspend then hibernate when suspend_hybrid is called):

# since the kernel does not directly support hybrid sleep, we do
# something else -- suspend and schedule an alarm to go into
# hibernate if we have slept long enough.
# Only do this if we do not need to do any special video hackery on resume
# from hibernate, though.
if [ -z "$SUSPEND_HYBRID_MODULE" -a -w "$PM_RTC/wakealarm" ] && \
check_suspend && check_hibernate && ! is_set $HIBERNATE_RESUME_POST_VIDEO; \ then SUSPEND_HYBRID_MODULE="kernel" do_suspend_hybrid() { WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))
echo >"$PM_RTC/wakealarm" echo$WAKETIME > "$PM_RTC/wakealarm" if do_suspend; then NOW=$(cat "$PM_RTC/since_epoch") if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ]; then log "Woken by RTC alarm, hibernating." # if hibernate fails for any reason, go back to suspend. do_hibernate || do_suspend else echo > "$PM_RTC/wakealarm"
fi
else
# if we cannot suspend, just try to hibernate.
do_hibernate
fi
}
fi


Recommended. Even easier to use uswsusp while the same time maximize the benefit of s2both i.e. s2both when suspend. Put the reverted code in do_suspend() part of uswsusp module (/usr/lib/pm-utils/module.d).

Reverted code (suspend_hybrid when suspend is called):

WAKETIME=$(($(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY)) echo >"$PM_RTC/wakealarm"
echo $WAKETIME > "$PM_RTC/wakealarm"
if do_suspend_hybrid; then
NOW=$(cat "$PM_RTC/since_epoch")
if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt$((WAKETIME + 30)) ];             then
log "Woken by RTC alarm, hibernating."
# if hibernate fails for any reason, go back to suspend_hybrid.
do_hibernate || do_suspend_hybrid
else
echo > "$PM_RTC/wakealarm" fi else # when do_suspend is being called, convert to suspend_hybrid. do_suspend_hybrid fi  With uswsusp, we can see the progress of suspend/hibernate and the reverse process displayed in text, even we can abort it by pressing backspace. Without uswsusp, suspend/hibernate just appear-disappear annoyingly, especially when wakealarm is triggered and execute hibernate (s2disk in uswsusp). Set the period of sleep before hibernate in the usual place on pm-functions file. # variables to handle hibernate after suspend support PM_HIBERNATE_DELAY=900 # 15 minutes PM_RTC=/sys/class/rtc/rtc0  Here's the uswsusp mod: (remember, this module is called from pm-functions so the inserted variables are the same) #!/bin/sh # disable processing of 90chvt and 99video. # s2ram and s2disk handle all this stuff internally. uswsusp_hooks() { disablehook 99video "disabled by uswsusp" } # Since we disabled 99video, we need to take responsibility for proper # quirk handling. s2ram handles all common video quirks internally, # so all we have to do is translate the HAL standard options to s2ram options. uswsusp_get_quirks() { OPTS="" ACPI_SLEEP=0 for opt in$PM_CMDLINE; do
case "${opt##--quirk-}" in # just quirks, please dpms-on) ;; # no-op dpms-suspend) ;; # no-op radeon-off) OPTS="$OPTS --radeontool" ;;
reset-brightness)  ;; # no-op
s3-bios)       ACPI_SLEEP=$(($ACPI_SLEEP + 1)) ;;
s3-mode)       ACPI_SLEEP=$(($ACPI_SLEEP + 2)) ;;
vbe-post)      OPTS="$OPTS --vbe_post" ;; vbemode-restore) OPTS="$OPTS --vbe_mode" ;;
vbestate-restore)  OPTS="$OPTS --vbe_save" ;; vga-mode-3) ;; # no-op save-pci) OPTS="$OPTS --pci_save" ;;
none)          QUIRK_NONE="true" ;;
*) continue ;;
esac
done
[ $ACPI_SLEEP -ne 0 ] && OPTS="$OPTS --acpi_sleep $ACPI_SLEEP" # if we were told to ignore quirks, do so. # This is arguably not the best way to do things, but... [ "$QUIRK_NONE" = "true" ] && OPTS=""
}

# Since we disabled 99video, we also need to handle displaying
# help info for the quirks we handle.
uswsusp_help()
{
echo  # first echo makes it look nicer.
echo "s2ram video quirk handler options:"
echo
echo "  --quirk-s3-bios"
echo "  --quirk-s3-mode"
echo "  --quirk-vbe-post"
echo "  --quirk-vbemode-restore"
echo "  --quirk-vbestate-restore"
echo "  --quirk-save-pci"
echo "  --quirk-none"
}

# This idiom is used for all sleep methods.  Only declare the actual
# do_ method if:
# 1: some other sleep module has not already done so, and
# 2: this sleep method can actually work on this system.
#
# For suspend, if SUSPEND_MODULE is set then something else has already
# implemented do_suspend.  We could just check to see of do_suspend was
# already declared using command_exists, but using a dedicated environment
# variable makes it easier to debug when we have to know what sleep module
# ended up claiming ownership of a given sleep method.
if [ -z "$SUSPEND_MODULE" ] && command_exists s2ram && \ ( grep -q mem /sys/power/state || \ ( [ -c /dev/pmu ] && check_suspend_pmu; ); ); then SUSPEND_MODULE="uswsusp" do_suspend() { WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))
echo >"$PM_RTC/wakealarm" echo$WAKETIME > "$PM_RTC/wakealarm" if do_suspend_hybrid; then NOW=$(cat "$PM_RTC/since_epoch") if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ]; then log "Woken by RTC alarm, hibernating." # if hibernate fails for any reason, go back to suspend_hybrid. do_hibernate || do_suspend_hybrid else echo > "$PM_RTC/wakealarm"
fi
else
# when do_suspend is being called, convert to suspend_hybrid.
do_suspend_hybrid
fi
}
fi

if [ -z "$HIBERNATE_MODULE" ] && \ [ -f /sys/power/disk ] && \ grep -q disk /sys/power/state && \ [ -c /dev/snapshot ] && command_exists s2disk; then HIBERNATE_MODULE="uswsusp" do_hibernate() { s2disk } fi if [ -z "$SUSPEND_HYBRID_MODULE" ] &&
grep -q mem /sys/power/state && \
command_exists s2both && \
check_hibernate; then
SUSPEND_HYBRID_MODULE="uswsusp"
do_suspend_hybrid()
{
uswsusp_get_quirks
s2both --force $OPTS } if [ "$METHOD" = "suspend_hybrid" ]; then