[mythtv-users] Two tuner sticks unstable together - need help

[Sven Bretfeld]

Hello

"Sven Bretfeld" <sven.bretfeld at gmx.ch> writes:

> The problem continues. The second tuner stick gets no lock, while the
> first one is recording. The signal of the second one has 78% to 88%. So,
> the reception doen't seem to be the problem. It must be a configuration
> issue. Yesterday evening I could switch the input source for LiveTV.
> There was no reboot in the meantime.

An addition that might be relevant. When I switch to the tuner which
gets no lock (hitting "y"), mythbackend gives a warning:

,----
| 2010-10-15 23:36:48.322 TVRec(2): Changing from None to WatchingLiveTV
| 2010-10-15 23:36:48.368 TVRec(2): HW Tuner: 2->2
| 2010-10-15 23:36:48.556 ProgramInfo(18411_20101015233204.mpg), Warning: MarkAsInUse(false, 'recorder'->'') -- use has changed since first setting as in use.
| 2010-10-15 23:36:48.594 ProgramInfo(18411_20101015233204.mpg), Warning: MarkAsInUse requires a key to delete in use mark
`----

"MarkAsInUse" looks suspicious. Is it possible that Mythtv somehow
thinks that the tuner is already in use? 

BTW, I noticed that no mpg files are created by the second tuner, but
this might be a secondary effect.

I'm quite desparated. I have lots of recordings planned that depend on
two working tuners. If the problem continues, half of the recordings
will fail. Could it be a solution if I buy another DVB-T stick of the
same type as one of the others and use two identical sticks instead of
two different ones?

Thanks for help

Sven