Every 10 seconds these errors are added to the /var/log/messages file
> Nov 24 01:06:41 vyos systemd[1]: serial-getty@ttyS0.service holdoff time over, scheduling restart. > Nov 24 01:06:41 vyos systemd[1]: Stopping Serial Getty on ttyS0... > Nov 24 01:06:41 vyos systemd[1]: Starting Serial Getty on ttyS0... > Nov 24 01:06:41 vyos systemd[1]: Started Serial Getty on ttyS0. > Nov 24 01:06:41 vyos agetty[27371]: /dev/ttyS0: not a tty > Nov 24 01:06:51 vyos systemd[1]: serial-getty@ttyS0.service holdoff time over, scheduling restart. > Nov 24 01:06:51 vyos systemd[1]: Stopping Serial Getty on ttyS0... > Nov 24 01:06:51 vyos systemd[1]: Starting Serial Getty on ttyS0... > Nov 24 01:06:51 vyos systemd[1]: Started Serial Getty on ttyS0. > Nov 24 01:06:51 vyos agetty[27378]: /dev/ttyS0: not a tty > Nov 24 01:07:01 vyos systemd[1]: serial-getty@ttyS0.service holdoff time over, scheduling restart. > Nov 24 01:07:01 vyos systemd[1]: Stopping Serial Getty on ttyS0... > Nov 24 01:07:01 vyos systemd[1]: Starting Serial Getty on ttyS0... > Nov 24 01:07:01 vyos systemd[1]: Started Serial Getty on ttyS0. > Nov 24 01:07:01 vyos agetty[27385]: /dev/ttyS0: not a tty > Nov 24 01:07:12 vyos systemd[1]: serial-getty@ttyS0.service holdoff time over, scheduling restart. > Nov 24 01:07:12 vyos systemd[1]: Stopping Serial Getty on ttyS0... > Nov 24 01:07:12 vyos systemd[1]: Starting Serial Getty on ttyS0... > Nov 24 01:07:12 vyos systemd[1]: Started Serial Getty on ttyS0. > Nov 24 01:07:12 vyos agetty[27394]: /dev/ttyS0: not a tty
I haven't experienced any issues from this but it does clutter the log file a lot