Bug#1051671: gdm3 no longer respects /etc/gdm3/greeter.dconf-defaults or its dconf settings, especially those for power

[Mad Horse]

Package: gdm3
Version: 45~beta-1
Severity: normal

Dear Maintainer,

As suggested in https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/22
I have been setting /org/gnome/settings-daemon/plugins/power/sleep-inactive-
ac-timeout to 0 for gdm3 to prevent it from suspending the computer when no one
is logging in, either from /etc/gdm3/greeter.dconf-defaults, or via `dbus-
launch dconf write /org/gnome/settings-daemon/plugins/power/sleep-inactive-ac-
timeout 0` running as Debian-gdm, but after gdm3 is upgraded to 45~beta-1, this
setting is no longer effective, and I have no idea how to prevent my computer
from suspending 20 minutes after the last user logs out.

Downgrading gdm3 to 44.1-2 can temporary fix this issue: On gdm3 44.1-2,
setting /org/gnome/settings-daemon/plugins/power/sleep-inactive-ac-timeout to
60 from either way can make the computer suspended 1 minute later, but on gdm3
45~beta-1, it will always be suspended 20 minute later, regardless of the
setting.


-- System Information:
Debian Release: trixie/sid
APT prefers testing
APT policy: (900, 'testing'), (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.4.0-4-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=zh_CN.utf8, LC_CTYPE=zh_CN.utf8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gdm3 depends on:
ii accountsservice 23.13.9-4
ii adduser 3.137
ii cdebconf [debconf-2.0] 0.270
ii dbus [default-dbus-system-bus] 1.14.10-1
ii dbus-bin 1.14.10-1
ii dbus-daemon 1.14.10-1
ii dconf-cli 0.40.0-4
ii dconf-gsettings-backend 0.40.0-4
ii debconf [debconf-2.0] 1.5.82
ii gir1.2-gdm-1.0 45~beta-1
ii gnome-session [x-session-manager] 44.0-3
ii gnome-session-bin 44.0-3
ii gnome-session-common 44.0-3
ii gnome-session-flashback [x-session-manager] 3.49.1-1
ii gnome-settings-daemon 45~beta-1
ii gnome-shell 44.4-1
ii gnome-terminal [x-terminal-emulator] 3.49.99-1
ii gsettings-desktop-schemas 44.0-2
ii libaccountsservice0 23.13.9-4
ii libaudit1 1:3.1.1-1
ii libc6 2.37-7
ii libcanberra-gtk3-0 0.30-10
ii libcanberra0 0.30-10
ii libgdk-pixbuf-2.0-0 2.42.10+dfsg-1+b1
ii libgdm1 45~beta-1
ii libglib2.0-0 2.77.3-1
ii libglib2.0-bin 2.77.3-1
ii libgtk-3-0 3.24.38-4
ii libgudev-1.0-0 237-2
ii libkeyutils1 1.6.3-2
ii libpam-modules 1.5.2-7
ii libpam-runtime 1.5.2-7
ii libpam-systemd [logind] 254.1-2
ii libpam0g 1.5.2-7
ii librsvg2-common 2.54.7+dfsg-2
ii libselinux1 3.5-1
ii libsystemd0 254.1-2
ii libx11-6 2:1.8.6-1
ii libxau6 1:1.0.9-1
ii libxcb1 1.15-1
ii libxdmcp6 1:1.1.2-3
ii lxterminal [x-terminal-emulator] 0.4.0-2
ii metacity [x-window-manager] 1:3.49.1-1
ii mlterm [x-terminal-emulator] 3.9.3-1
ii mutter [x-window-manager] 44.4-2
ii polkitd 123-1
ii procps 2:4.0.3-1
ii systemd-sysv 254.1-2
ii tilix [x-terminal-emulator] 1.9.5-2
ii ucf 3.0043+nmu1
ii x11-common 1:7.7+23
ii x11-xserver-utils 7.7+9+b1
ii xterm [x-terminal-emulator] 384-1

Versions of packages gdm3 recommends:
ii at-spi2-core 2.49.91-2
ii desktop-base 12.0.6+nmu1
ii gnome-session [x-session-manager] 44.0-3
ii gnome-session-flashback [x-session-manager] 3.49.1-1
ii x11-xkb-utils 7.7+7
ii xserver-xephyr 2:21.1.8-1
ii xserver-xorg 1:7.7+23
ii zenity 3.44.2-1

Versions of packages gdm3 suggests:
ii libpam-fprintd 1.94.2-2
ii libpam-gnome-keyring 42.1-1+b2
ii libpam-pkcs11 0.6.12-1
pn libpam-sss <none>
ii orca 44.1-2

-- debconf information:
gdm3/daemon_name: /usr/sbin/gdm3
* shared/default-x-display-manager: gdm3