Debian – How to hibernate a Debian 8 Jessie machine from command line? (S4 state)

debianhibernate

I have this old low-end desktop PC that I installed Debian on. This machine only supports wake on LAN on the S4 state, which is hibernate (suspend to disk?). When this machine had Windows I just hibernated it and WOL functioned correctly.

I have tried a handful of commands but they don't work, back when it had Windows if I hibernated it the machine would turn off completely, no LED power light or fans running, but when trying to hibernate it in Linux the machine goes unresponsive and goes on what seems to be a low-power consumption state, the power LED as well as internal fans are all still on and WOL still doesn't work. How do I go on about hibernating it completely like in Windows? I do not have a GUI installed.

Best Answer

I have gotten this from another blog and it works for me. This can work even without sudo as long as you have not modified your PAM configuration.

systemctl hibernate -i

Please take note systemctl --help for further options.

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Debian – Turn system on by USB keyboard

This depends on what level of ACPI wakeup is supported in your BIOS and motherboard. For more detail, please see ACPI global states; but in short, it will come down to your BIOS supporting wake from various states:

S3: Suspend to RAM
S4: Hiberate
G2/S5: Soft off

Additionally, on some motherboards, only a subset of USB ports might support wake-on-USB. I suggest checking the documentation for your manualboard.

Goldilocks did suggest in comments that a kernel hack might help, and he was close, but you don't actually need to modify the kernel. Instead, you would modify your poweroff scripts, such that at the last phase of poweroff, you write 4 or disk to /sys/power/state. I'm not sure that approach will actually help, unless your system only implements USB-wake-from-S4 and not USB-wake-from-S5, which is unlikely (they are practically identical in system design).

Debian – How to hibernate in Debian Jessie

This solved it for me. Apparently some BIOSes will not work with 'platform' which is the default.

# fix for current boot
echo shutdown > /sys/power/disk

To fix it across reboots:

# or fix permanently
apt-get install sysfsutils
echo "power/disk = shutdown" >> /etc/sysfs.d/local.conf
/etc/init.d/sysfs restart

Documentation:

Old kernel documentation: https://www.kernel.org/doc/Documentation/power/basic-pm-debugging.txt
My rough guide to install LMDE (Linux Mint Debian Edition) encrypted (LVM on LUKS): https://gist.github.com/seanorama/12c6383684022456a522

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Debian – Turn system on by USB keyboard

Debian – How to hibernate in Debian Jessie

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