I am trying to get my PC to suspend from the lightdm/slick-greeter logon screen (with all users logged out e.g. as per power on), if I have a power outage (e.g. whilst on holiday for 2 weeks) the PC will reboot and stay on but won't go into suspend/sleep.
The PC will go to a blank screen after 10 mins, but does not go into sleep.
I have done some research and have spent a good few hours (make that days) looking into this with various testing, to no avail.
The main thing I thought would work was:-
$ sudo -u lightdm gsettings list-recursively | grep sleep
org.cinnamon.SessionManager prefer-hybrid-sleep false
org.cinnamon.settings-daemon.plugins.power sleep-display-ac 1800
org.cinnamon.settings-daemon.plugins.power sleep-display-battery 1800
org.cinnamon.settings-daemon.plugins.power sleep-inactive-ac-timeout 0
org.cinnamon.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend'
org.cinnamon.settings-daemon.plugins.power sleep-inactive-battery-timeout 0
org.cinnamon.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend'
org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 900
org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend'
org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 900
org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend'
$ sudo -u lightdm dbus-launch gsettings set org.cinnamon.settings-daemon.plugins.power sleep-inactive-ac-timeout 90
Authorization required, but no authorization protocol specified
(I used 90 e.g. 90 secs to test as I did not want to be waiting around for 30 mins.
$ sudo -u lightdm gsettings list-recursively | grep sleep-inactive-ac-timeout
org.cinnamon.settings-daemon.plugins.power sleep-inactive-ac-timeout 90
But no, this did not work. (I did change the battery setting too)
I've also tried
sudo nano /etc/systemd/logind.conf
...
IdleAction=suspend
IdleActionSec=5min
This did not work either.
And various other things and combinations. So I have got to the point where it is probably easier to ask.
I also am not sure where the setting is for the screen going blank after 10 mins as it is obviously not the above settings.
Could you let me know how I can change this and also it may be worth putting these settings in the "lightdm-settings" app if possible.
Thanks
System:
Kernel: 6.8.0-57-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
Desktop: Cinnamon v: 6.2.9 tk: GTK v: 3.24.41 wm: Muffin v: 6.2.0 vt: 7 dm: LightDM v: 1.30.0
Distro: Linux Mint 22 Wilma base: Ubuntu 24.04 noble
I am trying to get my PC to suspend from the lightdm/slick-greeter logon screen (with all users logged out e.g. as per power on), if I have a power outage (e.g. whilst on holiday for 2 weeks) the PC will reboot and stay on but won't go into suspend/sleep.
The PC will go to a blank screen after 10 mins, but does not go into sleep.
I have done some research and have spent a good few hours (make that days) looking into this with various testing, to no avail.
The main thing I thought would work was:-
(I used 90 e.g. 90 secs to test as I did not want to be waiting around for 30 mins.
But no, this did not work. (I did change the battery setting too)
I've also tried
This did not work either.
And various other things and combinations. So I have got to the point where it is probably easier to ask.
I also am not sure where the setting is for the screen going blank after 10 mins as it is obviously not the above settings.
Could you let me know how I can change this and also it may be worth putting these settings in the "lightdm-settings" app if possible.
Thanks