If you have not already try setting DISPLAY to :0.0 (not 127.0.0.1:0.0). source: https://cygwin.com/ml/cygwin/2015-03/msg00240.html -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple