why can't get incoming COM2 data by the following command: $ cat /dev/ttyS2 but i can get the data by other windows serial monitor programs on the same port. -- woody -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/