diff --git a/update.cpp b/update.cpp
index 848cdfe..68942c3 100644
--- a/update.cpp
+++ b/update.cpp
@@ -340,13 +340,15 @@ bool Update::isSerialOpen() const {
     return m_hw->dc_isPortOpen();
 }
 
-bool Update::resetDeviceController() const {
+bool Update::resetDeviceController() const { // deprecated
+    return false;
+#if 0
     qDebug() << "resetting device controller...";
     m_hw->bl_rebootDC();
     // wait maximally 3 seconds, before starting bootloader
-    QThread::sleep(1);
     qInfo() << "resetting device controller...OK";
     return true;
+#endif
 }
 
 QByteArray Update::loadBinaryDCFile(QString filename) const {