I just checked my /dev area and do not have a serial entry of any kind
there. If your ID listed in all of the groups then this should not be
the problem you asked about. I just reread you email at the end of this
email, and you said you couldn't run you ham radio software. I sounds
like you can run the software but you don't seem to be communicating
with the rig, and indeed on one or two versions of Linux I had run
across the group issue, but not on any of the latest version I have
been running lately. Are you using a true serial cable or a USB adapter
then a serial cable, or a USB cable direct, I have that and my port is
listed as /dev/ttyUSB0, that is a zero on the end, then make sure the
speed is the same on the rig and the software.