I’ve been ‘toying’ with using my Garmin Forerunner 30x training GPSes in Linux. I’d been having all kinds of problems getting gpsd to work with it. Neither my 301 or 305 units are “supported” by gpsd - but, there was plenty of posts floating in the Interstew that led me to believe it could be done.

The key ingredient was this dandy diddle:

$ sudo mount -t usbfs none /proc/bus/usb/ 

I accidentally found it in an Ubuntu forum and to my surprise I was quickly able to get gpsd working.

Now, on to the fun stuff - reading gpsd from Ruby. :-)