so what are the permissions for ttyACM0 in /dev
should be 660, owned by root:dialout, with the sticky t set.
(at least on wheezy)
head=in over
http://i.imgur.com/oO11yPW.png?1
sorry...I'm still learning linux, and this machine is the only one with maya xfce because of its lack of other resources so I hardly ever mess around with it except for bfgminer.