After upgrade to Ubuntu version 20.4 the issue with the idle status reporting by lightdm-greeter remains. This continues to have idle setting of logind.conf ignored:
https://www.freedesktop.org/software/systemd/man/logind.conf.html > Note that this requires that user sessions correctly report the idle status > to the system. The system will execute the action after *all sessions* report > that they are idle, no idle inhibitor lock is active, and subsequently, the > time configured with IdleActionSec= (see below) has expired. At the other hand, installing lightdm and unity-greeter causes suspend to happen every 20 minutes while one screen shows greeter, regardless of all other screens. Reported also at https://askubuntu.com/questions/1337649/how-to-disable-suspend-in-20 -minutes-from-the-lightdm-login-screen and as https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1928305 There is a workaround available there (set both org.gnome.settings- daemon.plugins.power and com.canonical.unity.settings- daemon.plugins.power sleep-inactive-ac-type to 'nothing'), preventing the unexpected suspend by greeter. Issue of this bug remains since the greeter still does not report idle to logind. The script to check idle status of all session and force suspend overriding login screen needs update, systemd-inhibit --list does not have parseable output, like it was the case in systemd version 229. Needed to be replaced by command gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.ListInhibitors There are several other reports of this problem, for example also at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896083 or https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/22 but I am not sure about be the best upstream place to track this. It looks like gdm/lightdm greeter is not designed to work under logind but attempts to control the system sleep status on its own. ** Bug watch added: Debian Bug tracker #896083 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896083 ** Bug watch added: gitlab.gnome.org/GNOME/gnome-control-center/-/issues #22 https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/22 ** Attachment added: "Workaround, checking idle/inhibit status of all sessions, ignoring greeter" https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1730606/+attachment/5501243/+files/idlecheck.pl -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730606 Title: systemd idleaction=suspend not working in multiseat while a screen is showing login prompt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1730606/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
