Hello, If this is to any help, I have the same problem with DVBSky T680CI USB.Upgrading Ubuntu from 15.04 to 15.10 made MythTv stop working (No Lock).None of the kernels of Ubuntu 15.10 so far works, ie, 4.2.0-17...23.Booting with 3.19.0-32 makes it works again.I tried w_scan, and with 4.2.0 it finds nothing, with 3.19 no problem. I found lots of lines like this in mythbackend.log, it might point in the direction of the problem:mythbackend[3707]: E SignalMonitor recorders/dvbchannel.cpp:1026 (GetSignalStrength) DVBChan[5](/dev/dvb/adapter0/frontend0): Getting Frontend signal strength failed.#012#011#011#011eno: Operation not supported (95)
Best regards,Olle Olsson