[mythtv-users] Can't tune after UK switchover

[D. R. Newman]

On 14/07/11 12:01, John Pilkington wrote:
> On 14/07/11 11:33, David Watkins wrote:
>> On 14 July 2011 10:50, john legion<johnlegion6 at gmail.com>  wrote:
>>> Hi All,
>>>
>>> I am in Edinburgh and previous to the digital switchover I was able to see
>>> two transmitters, Blackhill and Craigkelly.
>>> Subsequent to the switchover I can no longer get  Mythtv to lock onto any
>>> channel on either transmitter.
>>>
>>> When I retuned I could see most multiplexes on both of the transmitters but
>>> not all.
>>> I have tried tuning using full scan in Myth, scan of existing transports,
>>> scan of existing transports where I had manually edited the transports to
>>> only include the few I would need and also by importing channels.conf .
>>>
>>> All of these methods according to Mythtv have found>100 channels and so
>>> everything seems good but when I go into the frontend then I can't watch
>>> live TV because the channel never gets past partial lock, even though the
>>> signal strength is ~75% .
>>>
>>> Also , no matter what I do I can't see any EIT data on any channel .
>>>
>>> With the ariel connected directly to my TV I can see all channels and EIT
>>> data. I can also play tv through Xine on the backend server so I guess that
>>> the ariel and card are working, it just seems to be some issue with Mythtv.
>>>
>>> Is anyone else seeing the same or does anyone have any suggestions ?

> There have been several similar threads on this list as different 
> regions have entered switchover.  The first thing to do is to delete all 
> your existing digital channels - which requires a high level of trust 
> but really is important.  Then you ought to decide which transmitter you 
> want to use and enter just one of its mux frequencies into the transport 
> editor, tick the 'search for other muxes' box and try a tuned scan. 
> With luck this might populate 4 other transports - or 5 if you have 
> dvb-t2.  If you don't get the luck try a few more searches on 
> gossamer-threads!

Note that if you don't delete the existing channels, the old multiplex
frequencies are still kept in a table in the mythconverg database. So
MythTV will try and use those frequencies for some of the channels. But
that is more likely to produce no lock, rather than 75%.