FTDI devices not showing up after reboot

Greetings 'duino peeps, I have a couple of Arduino-Compatible Nano V3s plugged into a laptop running Debian Wheezy. I'm having trouble that the 'duinos don't show up in the device list after reboot. They work fine if I unplug/replug, but not on system reboot.

Any idea what's going wrong? Is this expected behavior? If so, is there a workaround, like a startup script?

Thanks, JR