Index: kded/ui/mountdialog.cpp
===================================================================
--- kded/ui/mountdialog.cpp
+++ kded/ui/mountdialog.cpp
@@ -54,7 +54,9 @@
                     message = out + err;
                 }
 
-                QMessageBox::critical(this, i18n("Error details"), message);
+                auto messageBox = new QMessageBox(QMessageBox::Critical, i18n("Error details"), message, QMessageBox::Ok, this);
+                messageBox->setAttribute(Qt::WA_DeleteOnClose);
+                messageBox->show();
 
             });