STEPS TO REPRODUCE
- Start a Vyos ISO
- Run the following commands:
configure show system console device ttyS0
speed 9600 
speed 115200 
There are two speed lines in the default configuration file:
grep speed /opt/vyatta/etc/config/config.boot speed "115200" speed "9600"
This seems to be caused by the "3-to4" migration script in vyatta-config-migrate setting the speed to 9600 inconditionally.