timup · March 6, 2023 16:29 · Aug 10, 2014
diff --git a/xscreensaver-suspend b/xscreensaver-suspend
@@ -0,0 +1,62 @@
+#!/bin/bash
+# suspend/sleep linux system on xscreensaver activation
+#
+# run the bash script in your .xsession,
+# or something like .config/lxsession/LXDE/autostart for lxde
+
+timeout=60       # After xscreensaver activated, wait timeout to suspend
+read_timeout=5   # timeout for read from `xscreensaver-command -watch`
+
+SUSPEND_BIN=/usr/sbin/pm-suspend
+XSCREEN_CMD=/usr/bin/xscreensaver-command
+
+
+timeout=$(($timeout/$read_timeout))
+blanked=0
+timer=0
+#echo $timeout
+
+# count down before suspend
+do_suspend() {
+    timer=$(($timer + 1))
+    if [ ${timer} -ge ${timeout} ]; then
+        timer=0
+        sudo ${SUSPEND_BIN}
+        #echo "do suspend"
+    fi
+    #echo "timer: ${timer}"
+}
+
+process_watch() {
+    # suspend after screen blank
+    while :
+    do
+        # read xscreensaver -watch output
+        read -t ${read_timeout} input
+        if [[ $? -gt 0 && $? -lt 128 ]]; then 
+            break
+        fi
+
+        case "$input" in
+            UNBLANK*)
+                blanked=0
+                timer=0
+                ;;
+            LOCK* | BLANK*)
+                if [ ${blanked} = 0 ]; then
+                    blanked=1
+                    timer=0 # restart timer
+                fi
+                ;;
+        esac
+        #echo "$input $blanked"
+
+        # we are blanked, check do_suspend
+        if [ ${blanked} -gt 0 ]; then
+            do_suspend
+        fi
+    done
+}
+
+${XSCREEN_CMD} -watch | process_watch
+