[mythtv-users] scan fails, some old channels no longer "lock" but w-scan sees all channels

Tue May 1 12:14:28 UTC 2018

Hi,

   On the 24th, the French did something to their emitters and we need 
to rescan. TF1 works, but "France 2" fails. The Swiss channels all work.

However, using mythtv-setup, the scan option never detects any channels: 
"no new channels found"; even after I delete all channels from the 
channel table.

If I run

    w_scan -c CH > /var/tmp/channels.conf

The channels are detected proving that they are there:

C8;NTN:474000:B8D0G8M64T8Y0:T:27500:120=27:0;130,131,132:0;140,141:0:513:8442:2:0
BFM TV;NTN:474000:B8D0G8M64T8Y0:T:27500:320=27:0;330:0;340:0:515:8442:2:0
CNEWS;NTN:474000:B8D0G8M64T8Y0:T:27500:420=27:0;430:0;440:0:516:8442:2:0
CSTAR;NTN:474000:B8D0G8M64T8Y0:T:27500:520=27:0;530,531:0;540,541:0:517:8442:2:0
Gulli;NTN:474000:B8D0G8M64T8Y0:T:27500:620=27:0;630,631,632:0;640,641:0:518:8442:2:0
France 2;GR1 
B:666000:B8D0G8M64T8Y0:T:27500:120=27:0;130,131,132:0;140,142:0:257:8442:1:0
France 4;GR1 
B:666000:B8D0G8M64T8Y0:T:27500:320=27:0;330,331,332:0;340,342:0:260:8442:1:0
France Ô;GR1 
B:666000:B8D0G8M64T8Y0:T:27500:520=27:0;530,531:0;540:0:261:8442:1:0
franceinfo ;GR1 
B:666000:B8D0G8M64T8Y0:T:27500:620=27:0;630:0;640:0:262:8442:1:0
F3 
Rhħne-Alpes;FTV:666000:B8D0G8M64T8Y0:T:27500:220=27:230=fre at 3,231=qad,232=qaa:0;240,242:0:282:8442:1:0
F3 
Alpes;FTV:666000:B8D0G8M64T8Y0:T:27500:720=27:730=fre at 3,731=qad,732=qaa:0;740,742:0:324:8442:1:0
M6;Multi4:506000:B8D0G8M64T8Y0:T:27500:120=27:0;130,131,132:0;140,141:0:1025:8442:4:0
W9;Multi4:506000:B8D0G8M64T8Y0:T:27500:220=27:0;230,231,232:0;240,241:0:1026:8442:4:0
Arte;Multi4:506000:B8D0G8M64T8Y0:T:27500:320=27:0;330,331,332,333:0;340,341,342:0:1031:8442:4:0
France 
5;Multi4:506000:B8D0G8M64T8Y0:T:27500:420=27:0;430,431,432:0;440,441:0:1045:8442:4:0
6ter;Multi4:506000:B8D0G8M64T8Y0:T:27500:520=27:0;530,531,532:0;540,541:0:1046:8442:4:0
TF1;SMR6:498000:B8D0G8M64T8Y0:T:27500:120=27:0;130,131,132:0;150,151:0:1537:8442:6:0
NRJ12;SMR6:498000:B8D0G8M64T8Y0:T:27500:220=27:0;230,231,232:0;250,251:0:1538:8442:6:0
TMC;SMR6:498000:B8D0G8M64T8Y0:T:27500:620=27:0;630,631,632:0;650,651:0:1542:8442:6:0
TFX;SMR6:498000:B8D0G8M64T8Y0:T:27500:520=27:0;530,531:0;550,551:0:1544:8442:6:0
LCP;SMR6:498000:B8D0G8M64T8Y0:T:27500:720=27:0;730:0;750:0:1545:8442:6:0
8_Mont_Blanc;Harmonic:674000:B8D0G32M64T8Y0:T:27500:720=27:730=fra at 3:0:0:2050:8442:8:0
LemanBleu HD;LemanBleu 
TV:554000:B8:T:27500:516+515=27:517 at 3:518:0:513:0:3841:0
SRF 1;Schweizer Radio und 
Fernsehen:578000:B8C23D0G4M16T8Y0:T:27500:160=2:80=deu at 3,81=eng:32:0:1:8948:4:0
RTS Un;Radio Television 
Suisse:578000:B8C23D0G4M16T8Y0:T:27500:161=2:84=fra at 3,85=eng:35:0:257:8948:4:0
RTS Deux;Radio Television 
Suisse:578000:B8C23D0G4M16T8Y0:T:27500:164=2:96=fra at 3,97=eng:44:0:258:8948:4:0
RSI LA 1;Radiotelevisione 
svizzera:578000:B8C23D0G4M16T8Y0:T:27500:162=2:88=ita at 3,89=eng:38:0:513:8948:4:0

TF1, NRJ12, RTS* all work fine. But F3 or France 2, can no longer be 
seen by mythtv. My real TV is able to pick all those channels, but I did 
a rescan on it.

  So mythtv-setup fails to find any channel anymore. I'm including the 
logs of mythtv-setup. But I couldn't find anything useful in them.

fixes/29 [v29-rc1-4-g696806310a]
All channels seem to be shown with the message "Channel xx offset 1 -- 
Timed out, no si...". And then
    "Failed to find any new channels!"

However, I can see the Signal Strength bar move to above 50% for some of 
those channels.

I've included the log using --loglevel=debug. (Actually had to remove it 
to pass the max message size lmit)

   I'm also including a partial log of mythbackend --loglevel=debug when 
I try to watch the TV.
First I "watched TF1" and that worked, then I changed to "France 2" and 
I got the error that it couldn't get a lock.
There seems also to be a recording started on another channel (Swiss) 
which worked fine.

In the log, look for:

2018-04-28 17:11:34.363564 I  TVRec[17]: HandleTuning Request: 
Program(NULL) channel(2) input() flags(LiveTV,)
2018-04-28 17:11:39.390308 W  TVRec[17]: See 'Tuning timeout' in 
mythtv-setup for this input

   Otherwise, most recent version of Ubuntu 17.10.
System:    Host: mytv Kernel: 4.13.0-39-generic x86_64 bits: 64 gcc: 
7.2.0 Desktop: Xfce 4.12.3 (Gtk 2.24.31)
            Distro: Ubuntu 17.10
MythTV Version : v29-rc1-4-g696806310a
MythTV Branch : fixes/29
Network Protocol : 91
Library API : 29.20170212-1
QT Version : 5.7.1

    Given that I've been using MythTV for years, this is a bit 
frustrating: channel scanning used to work just fine.

Alain Brossard
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