While I waited for reply, I found an appropriate solution. The cause of the problem was that in the system with lightdm and unity-greeter installed as a desktop manager and a greeter respectively timeout intervals are given _twice_ as numeric values:
(1) Time before suspend in lightdm. (2) Time before suspend in unity-greeter. To change the first set of parameters (for lightdm) I needed to specify the values for the user lightdm by means of dconf editor: sudo -u lightdm dbus-launch gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0 sudo -u lightdm dbus-launch gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0 I also changed the type of action after the suspend time elapses to 'nothing' sudo -u lightdm dbus-launch gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'nothing' sudo -u lightdm dbus-launch gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'nothing' To change the second set of parameters (for unity-greeter) I needed to perform a similar action: sudo -u lightdm dbus-launch gsettings set com.canonical.unity.settings-daemon.plugins.power sleep-inactive-ac-timeout 0 sudo -u lightdm dbus-launch gsettings set com.canonical.unity.settings-daemon.plugins.power sleep-inactive-battery-timeout 0 And sudo -u lightdm dbus-launch gsettings set com.canonical.unity.settings-daemon.plugins.power sleep-inactive-ac-type 'nothing' sudo -u lightdm dbus-launch gsettings set com.canonical.unity.settings-daemon.plugins.power sleep-inactive-battery-type 'nothing' Test showed that no further suspend event was observed. There was no bug, rather simple misunderstanding of that lightdm and unity-greeter store parameters in different places. With kind regards, Ruben Alexandrovich Iskandaryan. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928305 Title: Lightdm ignores power saving settings; suspends system in 20 minutes regardless of sleep-inactive-ac-timeout parameter To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1928305/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
