Hello!
I working Galileo serial port.
Please find following. I changed to etc/inittab.
Before
# SERIAL CONSOLES
s0:12345:respawn:/sbin/agetty -L 115200 ttyS0 vt100
#s1:12345:respawn:/sbin/agetty -L 115200 ttyS1 vt100
After
# SERIAL CONSOLES
#s0:12345:respawn:/sbin/agetty -L 115200 ttyS0 vt100
s1:12345:respawn:/sbin/agetty -L 115200 ttyS1 vt100
But, not working USB serial. I will try improve.
this is bootlog.