diff --git a/python/tmc_parser.py b/python/tmc_parser.py
index df733e3..058a02a 100644
--- a/python/tmc_parser.py
+++ b/python/tmc_parser.py
@@ -305,10 +305,18 @@ class tmc_parser_Widget(QtGui.QWidget):
         filters=[{"type":"location", "str":lf},{"type":"event", "str":ef}]
         if tmc_dict.matchFilter(tmc_msg,self.showInvalid,filters):
             print_dbg("a",end="")
-            self.logOutput.append(Qt.QString.fromUtf8(tmc_msg.log_string()))
+            logstr=Qt.QString.fromUtf8(tmc_msg.log_string())
+            print_dbg(".",end="")
+            self.logOutput.append(logstr)
+            QtGui.QApplication.processEvents()
+            print_dbg(".",end="")
             print_dbg("a",end="")
-            self.logOutput.append(Qt.QString.fromUtf8(tmc_msg.multi_str()))
+            multistr=Qt.QString.fromUtf8(tmc_msg.multi_str())
+            print_dbg(".",end="")
+            self.logOutput.append(multistr)
             print_dbg("a",end="")
+            QtGui.QApplication.processEvents()
+            print_dbg(".",end="")
         if auto_scroll:
             #sb=self.logOutput.verticalScrollBar() #disabled 2017-04-28 might be cause of double free
             new_max=sb.maximum()
@@ -334,6 +342,7 @@ class tmc_parser_Widget(QtGui.QWidget):
           code.interact(local=locals())
         print("read filters,",end="")
         self.logOutput.clear()
+        QtGui.QApplication.processEvents()
         print("cleared,",end="")
         filters=[{"type":"location", "str":lf},{"type":"event", "str":ef}]
         #print("getting logstring with filters:%s, showInvalid:%i"%(filters,self.showInvalid))
@@ -342,6 +351,7 @@ class tmc_parser_Widget(QtGui.QWidget):
         
         print("got str,",end="")
         self.logOutput.append(Qt.QString.fromUtf8(logstr))
+        QtGui.QApplication.processEvents()
         self.logMutex.release(1)
         print("appended,",end="")
         self.parser.dataLock.release(1)