Let us know if it works. I am using Linux Mint sylvia, cinnamon 64 bit. If you do add yourself to the dialout group or it will not work. This is the method I use. It was a one time thing, did it and it still works after several upgrades.
If Linux does not see board Go to terminal and Run:
Type 'groups', is 'dialout' there ?
sudo usermod -a -G tty yourUserName
sudo usermod -a -G dialout yourUserName
Log off and log on again for the changes to take effect.