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Argh and grumble. I should have paid better attention to the output of dmesg | grep ftdi. There was ftdi stuff in there, but I didn't recognize any of it. In particular one brltty was showing up. I should have googled it. At which point I would have discovered this is the "Braille Display" thing. So apparently, default out of the box sets up some braille ...


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IIRC Jetson TK1's DB9 is connected to /dev/ttyS0 on Linux kernel. And the default Ubuntu distribution sets it up as kernel's console device (see cat /proc/consoles) and runs getty on it. You need to stop them for your application to use /dev/ttyS0 exclusively. To stop getty you could run stop ttyS0. I don't know how to detach /dev/ttyS0 from kernel ...


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If you are sure about the settings (Baud, parity, flow control) you use, I think that minicom does not "hang" but rather just "does not show anything". If it is female-to-female I would suspect the cable just does not "cross" TX and RX, this means that both source computer and target computer "speak" on the same line and "listen" on the same line (like when ...



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