How do I use pm-suspend-hybrid by default instead of pm-suspend?

Indirect hybrid sleep

This is the older method: first suspend and then wake up to hibernate after a delay (15 minutes by default). Use this with a Linux kernel before 3.6, or if you like that it does not use any power after 15 minutes any more.

Add the file /etc/pm/config.d/00-use-suspend-hybrid:

# Always use suspend_hybrid instead of suspend
if [ "$METHOD" = "suspend" ]; then
  METHOD=suspend_hybrid
fi
# The delay after which hibernation gets triggered (default: 900 seconds, 15 minutes):
PM_HIBERNATE_DELAY=900

You might want to make sure that the hybrid method is supported on your system via the following code. If it says "0" it should work:

sudo pm-is-supported --suspend-hybrid && echo $?

Real hybrid suspending with Linux 3.6+

If you have a Linux 3.6 kernel, you can use the following, which will suspend to both disk and RAM from the beginning.

Add the file /etc/pm/config.d/00-use-suspend-hybrid:

# WORKAROUND: always set the default hibernate mode first (normal mode)
# (not required if you have the patch mentioned by Rohan below (http://askubuntu.com/a/344879/169))
HIBERNATE_MODE=platform

# Always use hibernate instead of suspend, but with "suspend to both"
if [ "$METHOD" = "suspend" ]; then
  METHOD=hibernate
  HIBERNATE_MODE=suspend
fi

# Make sure to use the kernel's method, in case uswsusp is installed etc.
SLEEP_MODULE=kernel

This will always write the image to disk and then suspend to RAM, having the benefits that resuming will always be fast (as long as the battery does not run out) and that the machine will not wake up for a short time (after PM_HIBERNATE_DELAY) to hibernate for real.

The drawback is that the process takes longer (because it always hibernates to disk), and that your battery might run out in the long run (e.g. after 12 hours).

  • Corresponding blog post (not updated)

Ubuntu 18.04 a timed option

In Ubuntu 18.04 has has a new timed option. In systemd is availiable a new mode suspend-then-hibernate. This will start with the sleep mode and then transition to the hibernate mode after a fixed time.

In the hybrid-sleep mode, the hibernate part gets effective only when the battery is critically low and the system shuts down.

To start using this function you need to create a file /etc/systemd/sleep.conf with the next content:

[Sleep]
HibernateDelaySec=3600

This will go from sleep to hibernate after 1 hour of sleep. You can edit HibernateDelaySec to change the delay to hibernate.

First, test if suspend-then-hibernate works using systemd

Open a terminal by pressing Ctrl+Alt+T and enter:

sudo systemctl suspend-then-hibernate

If it works make it permanent.

  • The following works when I close the lid.

Open the file /etc/systemd/logind.conf using your preferred editor. You will need to invoke your administrative power by sudo, gksudo or pkexec to edit this file.

Find the two lines:

#HandleSuspendKey=suspend
#HandleLidSwitch=suspend

Note, These lines are commented out with # in front of them. The suspend is the default action. Remove the # and change suspend to suspend-then-hibernate in these two lines so that they look like this:

HandleSuspendKey=suspend-then-hibernate
HandleLidSwitch=suspend-then-hibernate

Save the file. Log out and log back in or restart logind service by the command:

systemctl restart systemd-logind.service

warning! your user session will be restarted

Source: Lid Closed Suspend then Hibernate

Ubuntu 16.04 and above

The solution by blueyed for Real hybrid suspending with Linux 3.6+ did not work for me. I suspect this is because Ubuntu 16.04 uses systemd and does not use the file /etc/pm/config.d/00-use-suspend-hybrid.

First, test if hibernate and hybrid-sleep works using systemd

Open a terminal by pressing Ctrl+Alt+T and enter:

sudo systemctl hibernate

This should get your computer to hibernate. To try hybrid-sleep, enter:

sudo systemctl hybrid-sleep

If it works make it permanent.

  • The following works when I close the lid.

Open the file /etc/systemd/logind.conf using your preferred editor. You will need to invoke your administrative power by sudo, gksudo or pkexec to edit this file.

Find the two lines:

#HandleSuspendKey=suspend
#HandleLidSwitch=suspend

Note, These lines are commented out with # in front of them. The suspend is the default action. Remove the # and change suspend to hybrid-sleep in these two lines so that they look like this:

HandleSuspendKey=hybrid-sleep
HandleLidSwitch=hybrid-sleep

Save the file. Log out and log back in.

Note:

  • Other than suspend or hybrid-sleep there is a third option, hibernate.
  • My laptop does not have a physical sleep button. So I could not test it.
  • Clicking on the Suspend from the cog menu puts the computer to normal suspend not hybrid-sleep.

Source: https://superuser.com/questions/719447/how-to-use-systemd-hybrid-sleep-instead-of-suspend-under-gnome-in-linux

I hope this helps


In 12.04 I noticed that when hibernation is triggered (using PM_HIBERNATE_DELAY=XX), the resume/thaw the shell scripts do not unset the grub recordfail variable. Therefore grub does not autoboot.

Timeout is set to -1 and it awaits user selection. I am guessing this requires some editing of scripts in /etc/pm/sleep.d/10_grub-common. Am a novice so I haven't dabbled to figure out the exact change unfortunately.

Tags:

Suspend

Hybrid

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