Don't abort connect if DTR setting fails. Should fix #601

printrun/printcore.py

@@ -197,8 +197,11 @@ class printcore():
                                           parity = PARITY_ODD)
                     self.printer.close()
                     self.printer.parity = PARITY_NONE
-                    if platform.system() != "Linux":  #there is a bug in pySerial preventing this from working on Linux, sadly.
+                    try:  #this appears not to work on many platforms, so we're going to call it but not care if it fails
                         self.printer.setDTR(dtr);
+                    except:
+                        #self.logError(_("Could not set DTR on this platform")) #not sure whether to output an error message
+                        pass
                     self.printer.open()
                 except SerialException as e:
                     self.logError(_("Could not connect to %s at baudrate %s:") % (self.port, self.baud) +