diff -ur systemd-stable-249.4_orig/src/login/logind-dbus.c systemd-stable-249.4/src/login/logind-dbus.c
--- systemd-stable-249.4_orig/src/login/logind-dbus.c	2021-08-24 13:04:08.000000000 +0200
+++ systemd-stable-249.4/src/login/logind-dbus.c	2021-10-31 11:42:45.354975259 +0100
@@ -1576,9 +1576,12 @@
 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
         int active = _active;
 
+        log_debug("send_prepare_for()");
+
         assert(m);
         assert(IN_SET(w, INHIBIT_SHUTDOWN, INHIBIT_SLEEP));
 
+        log_debug("send_prepare_for() sending PrepareFor...");
         return sd_bus_emit_signal(m->bus,
                                   "/org/freedesktop/login1",
                                   "org.freedesktop.login1.Manager",
@@ -1738,6 +1741,8 @@
         bool delayed;
         int r;
 
+        log_debug("bus_manager_shutdown_or_sleep_now_or_later() enter");
+
         assert(m);
         assert(unit_name);
         assert(w > 0);
@@ -1769,6 +1774,7 @@
                  * immediately */
                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
 
+        log_debug("bus_manager_shutdown_or_sleep_now_or_later() leave");
         return r;
 }
 
@@ -1857,6 +1863,8 @@
         uint64_t flags;
         int r;
 
+        log_info("method_do_shutdown_or_sleep() enter");
+
         assert(m);
         assert(message);
         assert(unit_name);
@@ -1885,6 +1893,9 @@
                 flags = interactive ? SD_LOGIND_INTERACTIVE : 0;
         }
 
+        log_debug("method_do_shutdown_or_sleep() flags parsed");
+
+
         if ((flags & SD_LOGIND_REBOOT_VIA_KEXEC) && kexec_loaded())
                 unit_name = SPECIAL_KEXEC_TARGET;
 
@@ -1905,8 +1916,11 @@
                         return r;
         }
 
+        log_debug("method_do_shutdown_or_sleep() operation verified");
+
         r = verify_shutdown_creds(m, message, w, action, action_multiple_sessions,
                                   action_ignore_inhibit, flags, error);
+        log_debug("method_do_shutdown_or_sleep() creds verified: %d", r);
         if (r != 0)
                 return r;
 
@@ -1914,6 +1928,7 @@
         if (r < 0)
                 return r;
 
+        log_debug("method_do_shutdown_or_sleep() leave");
         return sd_bus_reply_method_return(message, NULL);
 }