diff --git a/hiro/qt/application.cpp b/hiro/qt/application.cpp
index 2a4ac487a..83475d1d6 100644
--- a/hiro/qt/application.cpp
+++ b/hiro/qt/application.cpp
@@ -51,7 +51,20 @@ auto pApplication::quit() -> void {
 auto pApplication::setScreenSaver(bool screenSaver) -> void {
   #if defined(DISPLAY_XORG)
   if(state().screenSaverXDG && state().screenSaverWindow) {
+    //when invoking this command on Linux under Xfce, the follow message is written to the terminal:
+    //"org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files"
+    //to silence this message, stdout and stderr are redirected to /dev/null while invoking this command.
+    auto fd = open("/dev/null", O_NONBLOCK);
+    auto fo = dup(STDOUT_FILENO);
+    auto fe = dup(STDERR_FILENO);
+    dup2(fd, STDOUT_FILENO);
+    dup2(fd, STDERR_FILENO);
     invoke("xdg-screensaver", screenSaver ? "resume" : "suspend", string{"0x", hex(state().screenSaverWindow)});
+    dup2(fo, STDOUT_FILENO);
+    dup2(fe, STDERR_FILENO);
+    close(fd);
+    close(fo);
+    close(fe);
   }
   #endif
 }