>> If you were unable to reproduce the problem, it is probably because the configuration files are correct. Tried changing your gpsd file with the previous values, and you should end up with the mount problem again.
I don't think that's right. I experienced failure after changing the gspd file and rebooting. See
this post
and
this post
.
Thanks for the explanations of how this all works but I'm still not seeing anything that would explain the intermittent failure. It would be nice to create a rule that would get the dongle onto a completely different /dev entry.