[mythtv-users] DVB-T tuner appears to de-tune itself.

[Mike Perkins]

Paul Gillingham wrote:
> 
> Thanks,
> 
> That makes sense. But what's to stop all this careful configuration
> being lost again overnight when the system re-scans? (if indeed that
> is what it is doing). I may be wrong about myth updating the channel
> data overnight, but that's the only thing I can think of which
> explains why my perfect reception is being lost, re setup and then
> lost again.
> 
> Anyway, I have just tried deleting all channels and the doing an
> existing transport scan (rather than a full scan). This just scanned 6
> transports (which is correct as I think there are 6 multiplexes in the
> UK?), I believe these are good transports for me as I've already done
> my unplug the amp/full scan trick today. Anyway the scan returned all
> the channels including ITV. etc. so that's good.
> 
> I suppose what I have to do now is hope that Myth doesn't alter this
> overnight. (i.e. if it does do any channel editing it will remember
> that I only did a restricted scan and won't try looking for signals
> from different transports)
> 
Yup, I think you've got it. I've never had overnight problems of that sort. Myth 
should only do a scan when you ask it to. If you think myth is rescanning, that 
implies to me that your database is getting reversed somehow. You don't happen 
to have a rogue overnight backup script which is restoring instead, do you?

Another possibility is that the scan updates aren't sticking, but as far as I 
know, the back end reads tuner info only at startup. This would imply that your 
back end is restarting every night, as well as some kind of database problem.

-- 

Mike Perkins