diff --git a/src/utils/systemnotification.cpp b/src/utils/systemnotification.cpp
index 6e6eeac..7083afb 100644
--- a/src/utils/systemnotification.cpp
+++ b/src/utils/systemnotification.cpp
@@ -81,8 +81,13 @@ void SystemNotification::sendMessage(const QString& text,
              << QStringList()                // actions
              << hintsMap                     // hints
              << timeout;                     // timeout
-        m_interface->callWithArgumentList(
-          QDBus::AutoDetect, QStringLiteral("Notify"), args);
+        // Fire-and-forget: an asynchronous call never blocks the event loop,
+        // even when no notification daemon answers on the session bus (e.g.
+        // bare startx / tiling WM sessions). The previous synchronous
+        // callWithArgumentList stalled the main thread for the QtDBus reply
+        // timeout (~25s) after every capture, freezing further captures until
+        // it returned. The enclosing isValid() check already guards m_interface.
+        m_interface->asyncCallWithArgumentList(QStringLiteral("Notify"), args);
     }
 #endif
 }