Even with a fully fresh reistal of the RC PI2 version (and all updates), tvheadend is not working with my Sundtek DVB-C stick. Service scan does work with dvb5-scan. But within the tvheadend interface, channel list from /usr/share/tvheadend/data/dvb-scan/dvb-c/ is not selectable anywhere (/usr/share/tvheadend/data/dvb-scan is set as “DVB scan files path” in Configuration.)
The “TV adapters” section looks strange, too (it’s only one stick).