unable to open file '/etc/dconf/db/gdm'

fix-gdm-dconf-missing.md

Warning message: Dconf warnings about missing 'gdm', 'site' & 'distro' databases - Support / GNOME - Manjaro Linux Forum

Fix

# let dconf generate empty gdm db to eliminate warning
sudo mkdir -p /etc/dconf/db/gdm.d
sudo dconf update

Debug 過程

journalctl -b 0
# see warning, check pid
# unable to open file '/etc/dconf/db/gdm':...
journalctl -b 0 _PID=$PID -o verbose
# found _UID=60578
pkg-config --variable=greeter_uid_min systemd
# verify 60578 is GDM Greeter

Gemini found 60578 is GDM Greeter

Users, Groups, UIDs and GIDs on systemd Systems