[SOLVED] How to prevent Debian Buster from hibernating?

Geoff_L · 09-17-2019, 05:09 PM

One of my servers suffered a hard disk crash so I bit the bullet and fitted a new SSD onto which I did a netinst of Debian 10 and chose the Gnome desktop. In the Settings->Power UI dialog, I've turned off Automatic Suspend but the machine still goes into 'hibernation' (is this the same as 'suspend') after a short time. I have a virtual machine running on this host, so the host has at least one active process all the time.

How can I stop this machine from 'going to sleep'? Any help gratefully received.

jamison20000e · 09-17-2019, 07:35 PM

Good choice on distro!

Debian says try:

Code:

sudo systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target

from a simple web search:( How to prevent Debian Buster from hibernating? https://wiki.debian.org/Suspend#Disa...nd_hibernation,) hope it helps? I used KDE which also needs a little messing around stopping it but I do that all through the GUI.

Have fun!

Geoff_L · 09-18-2019, 04:09 AM

Quote:

Originally Posted by jamison20000e

Good choice on distro!

Debian says try:

Code:

sudo systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target

from a simple web search:( How to prevent Debian Buster from hibernating? https://wiki.debian.org/Suspend#Disa...nd_hibernation,) hope it helps? I used KDE which also needs a little messing around stopping it but I do that all through the GUI.

Have fun!

Many thanks for the link. Using the systemctl mask command resulted in the ".target" symlinks being reset to point to /dev/null, which makes a lot of sense.

FWIW, I tried searching the net but only found info on enabling hibernation. [turns and walks slowly from keyboard!].

FWIW2, I had kludged it by adding an instruction in crontab to echo something to /dev/null every five minutes. That achieved the objective, but didn't seem 'proper'!

Thanks again, Geoff

jamison20000e · 09-18-2019, 05:07 AM

Glad it worked.

As for the workaround, I do stuff like that all the time. Who cares about proper if it don't hurt anything!

tchor · 02-08-2022, 02:52 PM

On debian 11, gnome settings are not effective, if you are not logged in gnome. Bellow setting is ignored as well and the system is going to sleep after time.

Code:

# /etc/systemd/logind.conf
IdleAction=ignore

Here is workaround, which works for me:

Create service (maybe with another test expression) and enable it.

Code:

# /usr/lib/systemd/system/inhibit-sleep.service

[Unit]
Description=If AC is online, inhibit sleep
Before=sleep.target

[Service]
Type=oneshot
ExecStart=/bin/sh -c 'grep -qv 1 /sys/class/power_supply/AC/online'

[Install]
RequiredBy=sleep.target