Comment 1 for bug 632720

Here is a replacement /etc/init/openvt.conf job that should avoid this property, and open our auto-login shell on tty1 instead of tty7 while not interfering with X's VT switch:

  start on starting tty1

  respawn
  pre-start exec stop tty1
  exec /bin/openvt -e -c 1 -- /bin/auto-root-login

Can you see whether replacing openvt.conf with this fixes the behavior for you?