Tvheadend

Hi,

This is a very strange bug. Tvheadend server can tune only the first couple of channels (in the attached log it is 20) I have several hundreds of channels set but only the first 15-20 selected for wathcing are tuned. After restarting Tvheadned server I can select whatever channels but around 15-20 channel switching no more channel can be tuned. I can see permanent "Continuity counter errors" in the log.
Particularly odd, that the problem can be seen within a single mux as well. One channel works fine while the other shows permanent Continuity counter error on the same mux, depending on which channel was tuned in the first 15-20. See the log.
See the log:
network: "Thor 0.8W", mux: "12034V", provider: "UPC Direct", service: "m2 HD" works fine while "RTL Klub HD" on the same mux cannot be received. If I restart Tvheadend and start with "RTL Klub HD" it works fine and if "m2 HD" is not in the first 15-20 channels I selected for watching then it will not work.

The problem can be seen on a Wetek Play dual DVB-S2 tuner box. The fault affects only the second tuner which has advanced LNB switch configuration.
I would exclude any HW root cause, as the issue may affect any channel and the TVH addon restart recovers the problem.
All selected channel are located on the same satellite. No diseqc input switch has to take place to see this problem.

How to reproduce the fault:
- Have advanced 1/10 diseqc switch configuration
- restart the addon
- select random channels on the client
- after 15-20 channel switch no more channel can be tuned. The first 15-20 channel selected before can be tuned again anytime.

Recovery:
- restart the Tvheadend addon
- it will work fine for the next 15-20 channel switch, when the issue pops up again.

I think this problem has been present for longer time. At least since 4.3.628