Hi, > >Could you try what happens when you manually disable ixon on the port once > >it's stuck? > > > Is this the right way to do it? > > # stty -ixon -F /dev/ttyUSB0 > > If yes it doesn't change behavior. Neither ixon or [-]ixoff. Seems about right--and I just checked, that immediately resumes any buffered output on one adapter I have here. > I have two pl2303 based adapters which behave the same: > > ID 0557:2008 ATEN International Co., Ltd UC-232A Serial Port [pl2303] > ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port What is the output of usb-devices for those? Regards, Florian