on the problematic xubuntu host, i tried... $ echo TEST>/dev/ttyS0 and $ sudo echo TEST>/dev/ttyS0
both gave me prompt again
while on the target host, i had... $ sudo cat /dev/tty00 and $ sudo hexdump /dev/tty00 and $ sudo less -f /dev/tty00 and $ sudo od /dev/tty00
didn't display anything...
one time, i got the following wit hexdump: 0000000 0000 0000 0000 0000 0000 0000 0000 0000 but i could not repeat this.
on the problematic xubuntu host, i tried...
$ echo TEST>/dev/ttyS0
and
$ sudo echo TEST>/dev/ttyS0
both gave me prompt again
while on the target host, i had...
$ sudo cat /dev/tty00
and
$ sudo hexdump /dev/tty00
and
$ sudo less -f /dev/tty00
and
$ sudo od /dev/tty00
didn't display anything...
one time, i got the following wit hexdump:
0000000 0000 0000 0000 0000 0000 0000 0000 0000
but i could not repeat this.