I had LE 12.0.2 with tvheadend 4,2 working well, but upgraded to LE 12.2.0 and read tvheadend 4.3 has to be used. I uninstalled tvh 4.2 and installed 4.3 but had no luck with the tvh setup (no muxes found). To avoid troubles from any "old leftover files" I did a new install of LE and tvh 4.3 but tvh finds no muxes and no services.
The tuner is a USB Hauppauge-soloHD (lsusb: Bus 001 Device 005: ID 2040:8268 Hauppauge soloHD), and it is a DVB-C network.
I believe it's a firmware problem, since it worked with LE 12.0.2 and TVH 4.2.
I'm on holidays the next 10 days without access to the I-net. I will read your answers after my holidays.
Greetings from Vienna, Austria,
Heinz