In /etc/udev/rules.d, create a file called 10-local.rules if there isn't one already. Then create a rule: KERNEL=="ttyACM*", NAME="%k", MODE="0666", OPTIONS="last_rule" This will override the line from 50-udev.rules: KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0660" In the case of /dev/vedio0, it should already be set correctly by console.perms. The lines that take care of this are: <v4l>=/dev/video* /dev/radio* /dev/winradio* /dev/vtx* /dev/vbi* \ /dev/video/* and <console> 0600 <v4l> 0600 root Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!