It is USB powered so the box determines what happens. I just upgraded the box to get the latest vortexplayer version and the DACport is now back to 0. I have unpluged no devices, the DACport remains plugged into the same USB port.
Would love to be able to fix it to a location. Will leave it for now and keep looking at it.
The only thing I can think of is to turn the soundcard off - I guess this would mean finding a keyboard and monitor to modify the BIOS settings on the box?
Anyone else finding that the ALSA device list is changing?