I did a clean install of Ubuntu 20.04 from Ubuntu 18.04, and now kaffeine with my Hauppaugge TV tuner won't detect all the channels I had.

I am based in the UK, and can pick up two transmitters - Hannington and Crystal Palace, but I cannot detect - at least - BBC Four.

Previously, I had a similar issue, and found a way around it, but now I am without ideas.

I have tried the latest scanfile.dvb from linuxtv (I think) without benefit; I have tried to edit the scanfile.dvb file and adding any additional transmitter data from ukfree.tv.

None of these have worked.

Any ideas as to how to get all the channels that I should be able to receive would be appreciated.

Many thanks,