id summary reporter owner description type status milestone component version severity resolution keywords cc 4625 Can't set or unset serial hardware flow control on QNX Niklas Angare chris_kohlhoff "serial_port_base::flow_control doesn't support hardware flow control on QNX. On QNX, the IHFLOW and OHFLOW flags are used to control hardware flow control for input and output respectively. Documentation:[[BR]] http://www.qnx.com/developers/docs/6.5.0/topic/com.qnx.doc.neutrino_lib_ref/t/termios.html I've attached a patch to add this functionality. I've tested all the code paths on QNX 6.5.0 against the output of the stty command. If the input and output flags are inconsistent I did what the Windows version seems to do, ie consider hardware flow control to be off. " Patches closed To Be Determined asio Boost 1.44.0 Problem fixed QNX