[twobob]

looking at the tty devices (as I have little idea about them - am reading up)

[root@kindle /dev]# ll tty0
crw-r--r-- 1 root root 4, 0 Oct 25 17:10 tty0

[root@kindle /dev]# ll /sys/class/tty
total 0
lrwxrwxrwx 1 root root 0 Oct 25 17:04 console -> ../../devices/virtual/tty/console

lrwxrwxrwx 1 root root 0 Oct 25 17:04 ptmx -> ../../devices/virtual/tty/ptmx

lrwxrwxrwx 1 root root 0 Oct 25 17:04 tty -> ../../devices/virtual/tty/tty

lrwxrwxrwx 1 root root 0 Oct 25 17:12 ttyUSB0 -> ../../devices/platform/fsl-ehci.0/usb1/1-1/1-1:1.0/ttyUSB0/tty/ttyUSB0

lrwxrwxrwx 1 root root 0 Oct 25 17:12 ttyUSB1 -> ../../devices/platform/fsl-ehci.0/usb1/1-1/1-1:1.1/ttyUSB1/tty/ttyUSB1

lrwxrwxrwx 1 root root 0 Oct 25 17:04 ttymxc0 -> ../../devices/platform/mxcintuart.0/tty/ttymxc0

lrwxrwxrwx 1 root root 0 Oct 25 17:04 ttymxc1 -> ../../devices/platform/mxcintuart.1/tty/ttymxc1

lrwxrwxrwx 1 root root 0 Oct 25 17:04 ttymxc2 -> ../../devices/platform/mxcintuart.2/tty/ttymxc2

will do a reboot and try that again.