[mythtv] Re: DVB - "Unable to find channel in database"

[Blammo]

On Tue, 8 Mar 2005 06:40:27 +0100, Leandro Dardini <ldardini at tiscali.it> wrote:
> Unfortunately this is not enough. When mythbackend is tuned on a channel, it
> remains tuned until mythfrontend asks to change channel. Database is read
> only on startup. It is not read switching from None to LiveTV.

At least when it comes to DVB cards, it doesn't appear that way. The
backend opens and closes the card, setting the Startup Channel each
time, IE:

2005-03-08 00:11:45.293 Changing from None to WatchingLiveTV
2005-03-08 00:11:45.410 Using profile 'Live TV' to record
2005-03-08 00:11:45.419 DVB#0 DVB SI Table Parser Started
2005-03-08 00:11:45.421 DVB#0 Using DVB card 0, with frontend Nextwave
nxt2002 VSB/QAM frontend.
2005-03-08 00:11:45.423 DVB#0 DVB Signal Monitor Starting
2005-03-08 00:11:45.495 DVB#0 Trying to tune to channel 15_1.
2005-03-08 00:11:45.503 DVB#0 Signal Locked
2005-03-08 00:11:45.569 DVB#0  Mod:
2005-03-08 00:11:45.831 DVB#0 Signal Lost
2005-03-08 00:11:46.086 DVB#0 Signal Locked
2005-03-08 00:11:46.423 DVB#0 Waiting for frontend event after tune.
2005-03-08 00:11:46.427 DVB#0 DVB signal fd50 | snr e18c | ber    0 | unc    0
2005-03-08 00:11:46.428 DVB#0 Status: LOCK.
2005-03-08 00:11:46.430 DVB#0 Multiplex Locked
2005-03-08 00:11:47.634 DVB#0 Successfully tuned to channel 15_1.
2005-03-08 00:11:47.636 DVB#0 Recorder: Card opened successfully
(using PS mode).
2005-03-08 00:11:47.638 DVB#0 AutoPID selecting PID 49, MPEG-2 Video
2005-03-08 00:11:47.640 DVB#0 AutoPID selecting PID 52, AC3 Audio
2005-03-08 00:11:47.641 DVB#0 AutoPID Complete - PAT/PMT Loaded for service
2005-03-08 00:11:47.642 DVB#0 Service is FTA
2005-03-08 00:11:47.643 DVB#0 Adding pid 49
2005-03-08 00:11:47.645 DVB#0 Adding pid 52
2005-03-08 00:11:47.783 DVB#0 Data read from DMX - This is for
debugging with transform.c
2005-03-08 00:11:53.122 Changing from WatchingLiveTV to None
2005-03-08 00:11:53.170 Closing DVB recorder
2005-03-08 00:11:53.172 Closing DVB channel
2005-03-08 00:11:53.425 DVB#0 DVB Signal Monitor Stopped

It appears to be partially a backend problem (can't open an invalid
channel, null or .) and partially a front end issue, as Taylor alludes
to (frontend can't function without a feed). I'm not sure which end
needs the fix, I could see where fixing either side could solve the
root.