[mythtv-users] Difficult TV reception

[Jean-Yves Avenard]

Hello

Since I upgraded mythtv to the latest package available I can not tune
to two channels.

I have a PC with 3 DVB-T adapter running FC5 and the latest mythtv
package from ATrpms.

For some reasons on one of those adapter I can not tune to a specific
channel. However, using dvbstream and mplayer I can watch this channel
just fine with all 3 DVB-T adapters (I use something like dvbstream -c
0 -f 536625 -bw 7 -tm 8 -gi 8 -v 161 -a 81 -o | mplayer -) .

When I select the channel with mythtv after a little while it shows up
as a dark-grey empty box and you see the signal quality to vary
between 20% and 60% (displayed at the bottom of the screen).
At 20% signal quality, no doubt nothing can be received. However
dvbstream/mplayer never gives me any trouble.

tzap utility gives me:
tzap -a 0 "SBS DIGITAL 1"
status 1f | signal d36e | snr baba | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal b36e | snr b5b5 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal c371 | snr b7b7 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal b368 | snr b8b8 | ber 00000000 | unc 00000000 | FE_HAS_LOCK

tzap -a 1 "SBS DIGITAL 1"
status 1e | signal 7cff | snr cdcd | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1e | signal 7def | snr cece | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1e | signal 7e0f | snr cfcf | ber 00000000 | unc 00000000 | FE_HAS_LOCK

tzap -a 1 "SBS DIGITAL 1"
status 1f | signal 6350 | snr baba | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal 635a | snr bebe | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal 7369 | snr bdbd | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal 7356 | snr bfbf | ber 00000000 | unc 00000000 | FE_HAS_LOCK

As you can see, all adapters can grab a lock with this channel.
But through MythTV it can't ...

Any ideas what I could be missing/overlooked ?

Thanks in advance
JY