Hi, > >And what if you disable the getty? Does the port work then? > > > systemctl disable serial-getty@ttyUSB0.service followed by reboot > and I can see everything what systemd is outputting there as well as > what is dumped to /dev/kmsg so it looks getty started by systemd > changes or triggers the port reconfiguration. Could you try what happens when you manually disable ixon on the port once it's stuck? > Does the IXON behavior differ from 8250 based serial consoles? I > have the same user space and 8250 based serial consoles work fine. Well, it shouldn't, but it's implemented in hardware rather than in software as it is for 8250 and similar UARTs, so chances are you have a chip that somehow behaves differently than what that change was tested on. Regards, Florian
