Linux is fine, the edgeport is not a common consumer device. It is however a very common industrial device. A normal developer for an industrial system would contact Digi usually for assistance in making their device work. You might email them for assistance if you can't find the doc's on their site. Last night, I found their site in confusion and disarray.
As of a few years ago, the USB maintainers did supply support for at least two of the chips in Digi boxes.
As you say, you have io_edgeport or at least it reports as such.
It is pretty easy to boot to a few distro's and see if your light corrects to the windows state. I believe it should act as windows does.
It is easy to make a loopback connector and see if your serial ports are really working.
I have used Digi boards for decades from isa cards to usb on QNX, Windows and Linux but I never set up the system. Since you posted this, I guess it can't hurt me to learn more about it. It would be a help for me to diag machines more fully by digging into this device.
As far as I know, I may have only replaced one or two of these in all my years with them.
Last edited by jefro; 05-25-2013 at 02:43 PM.