diff -Naur kdesu/stub.cpp kdesu.new/stub.cpp
--- kdesu/stub.cpp	2008-05-21 08:08:55.000000000 -0300
+++ kdesu.new/stub.cpp	2009-10-13 01:32:10.000000000 -0300
@@ -105,6 +105,7 @@
 int StubProcess::ConverseStub(int check)
 {
     QByteArray line, tmp;
+
     while (1)
     {
 	line = readLine();
@@ -117,7 +118,17 @@
 	    enableLocalEcho(false);
 	    if (check) writeLine("stop");
 	    else writeLine("ok");
-	} else if (line == "display") {
+	    break;
+	} 
+    }
+
+    while (1)
+    {
+	line = readLine();
+	if (line.isNull())
+	    return -1;
+
+        if (line == "display") {
 	    writeLine(display());
 	} else if (line == "display_auth") {
 #ifdef Q_WS_X11
diff -Naur kdesu/su.cpp kdesu.new/su.cpp
--- kdesu/su.cpp	2008-05-21 08:08:55.000000000 -0300
+++ kdesu.new/su.cpp	2009-10-19 00:21:31.000000000 -0200
@@ -258,13 +258,6 @@
             //////////////////////////////////////////////////////////////////////////
             case WaitForPrompt:
             {
-                // In case no password is needed.
-                if (line == "kdesu_stub")
-                {
-                    unreadLine(line);
-                    return ok;
-                }
-
                 while(waitMS(fd(),100)>0)
                 {
                     // There is more output available, so the previous line
@@ -279,6 +272,13 @@
                     kDebug(900) << k_lineinfo << "Read line <" << more << ">";
                 }
 
+                // In case no password is needed.
+                if (line == "kdesu_stub")
+                {
+                    unreadLine(line);
+                    return ok;
+                }
+
                 // Match "Password: " with the regex ^[^:]+:[\w]*$.
                 const uint len = line.length();
                 for (i=0,j=0,colon=0; i<len; i++)