i3: improve automatic/timeout/suspend locking

.config/i3/config

@@ -137,7 +137,7 @@ bindsym $mod+Return             exec i3-sensible-terminal
 bindsym $mod+Ctrl+Return        exec i3-sensible-terminal -r floating-term
 bindsym $mod+Shift+Return       exec i3-sensible-terminal -d "`xcwd`"
 bindsym $mod+Ctrl+Shift+Return  exec i3-sensible-terminal -r floating-term -d "`xcwd`"
-bindsym $mod+l                  exec ~/.config/i3/lock.sh
+bindsym $mod+l                  exec dm-tool switch-to-greeter
 bindsym $mod+space              exec "pkill rofi; rofi -show run -sidebar-mode -terminal i3-sensible-terminal -normal-window"
 bindsym $mod+Shift+p            exec rofi-pass
 bindsym $mod+Shift+e            exec rofi-emoji
@@ -164,7 +164,8 @@ bindsym XF86MonBrightnessDown   exec xbacklight -dec 5 && pkill -RTMIN+12 i3bloc
 # app launch shortcuts
 exec --no-startup-id ~/.config/i3/disable-standby-fs.py
 exec --no-startup-id feh --no-fehbg --no-xinerama --bg-fill ~/pictures/lakesidesunrise.jpg
-exec --no-startup-id xautolock -time 5 -locker 'dm-tool lock' -nocloseout -nocloseerr
+exec --no-startup-id xautolock -time 5 -locker 'dm-tool switch-to-greeter' -nocloseout -nocloseerr
+exec --no-startup-id xss-lock dm-tool switch-to-greeter
 
 # startup programs
 exec --no-startup-id nextcloud

.config/i3/powermenu.sh

@@ -3,7 +3,7 @@
 option=$(echo "lock|logout|sleep|hibernate|power off|reboot|windows" | rofi -sep "|" -dmenu -i -p "" -auto-select -hide-scrollbar -monitor 0 -width 8 -lines 7 -location 3 -tokenize false -matching normal | xargs)
 
 case $option in
-    lock) ./lock.sh;;
+    lock) dm-tool switch-to-greeter;;
     logout) i3-msg exit;;
     sleep) systemctl suspend;;
     hibernate) systemctl hibernate;;

.config/systemd/user/sleep-i3lock@.service

@@ -1,10 +0,0 @@
-[Unit]
-Description=Lock X session using i3lock
-
-[Service]
-User=%i
-Environment=DISPLAY=:0
-ExecStart=sh -c '~/.config/i3/lock.sh'
-
-[Install]
-WantedBy=sleep.target

.config/systemd/user/sleep-lock-lightdm.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Lock X LightDM session before sleeping
+Before=sleep.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/dm-tool switch-to-greeter
+# Ensure enough time for the session to lock before sleeping
+ExecStartPost=/usr/bin/sleep 1
+
+[Install]
+WantedBy=sleep.target

.config/systemd/user/sleep.target.wants/sleep-lock-lightdm.service

@@ -0,0 +1 @@
+../sleep-lock-lightdm.service

.profile

@@ -76,6 +76,7 @@ fi
 if [ -z "$DBUS_SESSION_BUS_ADDRESS" ] && exists dbus-launch; then
     eval $(dbus-launch --sh-syntax --exit-with-session)
     dbus-update-activation-environment --systemd \
-        DBUS_SESSION_BUS_ADDRESS DISPLAY XAUTHORITY
+        DBUS_SESSION_BUS_ADDRESS DISPLAY XAUTHORITY \
+        XDG_SEAT_PATH
 fi