No, I didn't rename anything. Did you disabled / disconnected the SPDIF out? that's weird that you didn't see it in the Sound Control Panel. I see it for my X3, but it won't let me configure the speakers, so it's always at Stereo. Maybe you need to connect to the SPDIF output of your G6 in order to see it?
No, it's not disabled else I would see it as well.
And it's always connected, just tested it and my optical out is working fine.
Do others with the G6 see two output devices in control panel?