Kobo: suspend correct (state-extended avant rtcwake) + hwclock sync + logs suspend

kobo/monitorinkloop.sh

@@ -37,19 +37,23 @@ display() {
 }
 
 suspend_for() {
+    # Séquence Kobo éprouvée (trmnl-kobo) : state-extended=1 AVANT rtcwake, puis
+    # suspend manuel (echo mem) si rtcwake n'a pas vraiment suspendu.
     secs="$1"
+    sync
+    echo 1 > /sys/power/state-extended 2>/dev/null
     start=$(date +%s)
     "$BUSYBOX" rtcwake -a -s "$secs" -m mem 2>/dev/null
-    end=$(date +%s)
-    if [ $((end - start)) -lt 10 ]; then
-        log "rtcwake fallback (state-extended)"
-        echo 1 > /sys/power/state-extended 2>/dev/null
-        sleep 2
+    elapsed=$(( $(date +%s) - start ))
+    log "rtcwake elapsed=${elapsed}s"
+    if [ "$elapsed" -le 10 ]; then
+        log "suspend manuel via echo mem"
+        sleep 1; sync; sleep 2
+        m_start=$(date +%s)
         echo mem > /sys/power/state 2>/dev/null
-        echo 0 > /sys/power/state-extended 2>/dev/null
-        now=$(date +%s)
-        [ $((now - start)) -lt 10 ] && { log "suspend KO -> sleep $secs"; sleep "$secs"; }
+        log "echo mem elapsed=$(( $(date +%s) - m_start ))s (≈${secs}=OK, ≈0=Nickel bloque)"
     fi
+    echo 0 > /sys/power/state-extended 2>/dev/null
 }
 
 while true; do