I have a VU+ Duo, Black Hole 2.1.1 and I was trying to make two additional USB DVB-T tuners to work. I had to install Sundtek drivers using the sundtek_netinst.sh script. If only one tuner is plugged, it is recognized as tuner C and is working. If both are plugged, the Sundtek is recognized as tuner C and is working but not reliably. No Realtek, no tuner D. I have tried to plug the tuners into a powered USB hub, not powered USB hub and different USB ports directly on the Duo - it didn't help. If there is any additional information needed, I'll gladly provide it Is it an unsupported feature, what I'm trying to do or should it work ? PS: A strange thing happens, when I connect a powered USB hub - the Duo isn't booting, I can hear the HDD spinning up, but the red LED stays on and nothing appears on the display.