In that case you should expect that running as root would allow it to work, but you reported it is not. If both ieee1394 and firewire subsystems are enabled in the kernel, then it may create this problem:
grep FIREWIRE /boot/config-$(uname -r)
In that case you should expect that running as root would allow it to work, but you reported it is not. If both ieee1394 and firewire subsystems are enabled in the kernel, then it may create this problem:
grep FIREWIRE /boot/config- $(uname -r)