I believe I am having the exact same problem:
I am following the "Getting Started with Vivado and Vitis for Baremetal Software Projects" tutorial on the Zybo Z7 Resource Center page.
I have successfully built the project. JP5 (The programming mode select jumper) is set to "JTAG".
My USB JTAG/UART port is connected to a USB port on my pc using the cable that came with the board.
I am using Vivado HLS version 2020.1 (as specified in the tutorial) on CentOS 7.
I have opened a PuTTY terminal (115200 baud,8 data,1 stop, no parity, no flow control) connected to ttyUSB0.
Running "dmesg | grep FTDI" produces this:
[ 357.584207] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 357.584670] ftdi_sio 7-1:1.0: FTDI USB Serial Device converter detected
[ 357.587648] usb 7-1: FTDI USB Serial Device converter now attached to ttyUSB0
[ 357.587694] ftdi_sio 7-1:1.1: FTDI USB Serial Device converter detected
[ 357.591322] usb 7-1: FTDI USB Serial Device converter now attached to ttyUSB1
My questions:
1] I think I have done everything specified in the tutorial. Have I missed some setting that would cause this?
2] How do I know which port (ttyUSB0 or ttyUSB1) my terminal should attach to?