Florian Hackenberger wrote:
> Public bug reported:
> 
> Binary package hint: mythtv
> 
> Scanning for channels, and importing previously scanned channels from a 
> channels.conf file is buggy. Mythtv sucessfully creates the transponders and 
> channels (it detects the channels, obtains a lock and stores them in the 
> database), but the mythfrontend cannot tune them (no lock). Upon further 
> investigation I noticed that the mplexid column of the channel table points 
> to the wrong entry in the dtv_multiplex table. This seems to be related to 
> the following upstream bugs:
> http://svn.mythtv.org/trac/ticket/4138
> http://svn.mythtv.org/trac/ticket/4163
> http://svn.mythtv.org/trac/ticket/4154
> 
> This bug unfortunately breaks mythtv for DVB-T in (at least) Austria.
> 
> Here is the output from the database before fixing the mess caused by the bug:
> mysql> select * from channel;
> +--------+---------+--------+----------+----------------+----------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
> | chanid | channum | freqid | sourceid | callsign       | name           | 
> icon | finetune | videofilters | xmltvid | recpriority | contrast | 
> brightness | colour | hue   | tvformat | commfree | visible | outputfilters | 
> useonairguide | mplexid | serviceid | atscsrcid | tmoffset | atsc_major_chan 
> | atsc_minor_chan |
> +--------+---------+--------+----------+----------------+----------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
> |  11121 | 10121   | NULL   |        1 | PULS 4         | PULS 4         |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 0 |       3 |     10121 |      NULL |        0 |               0 |            
>    0 | 
> |  12302 | 11302   | NULL   |        1 | 3SAT           | 3SAT           |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 1 |       3 |     11302 |      NULL |        0 |               0 |            
>    0 | 
> |  12303 | 11303   | NULL   |        1 | ORF Sport Plus | ORF Sport Plus |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 1 |       3 |     11303 |      NULL |        0 |               0 |            
>    0 | 
> |  11101 | 10101   | NULL   |        1 | ORF1           | ORF1           |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 1 |       1 |     10101 |      NULL |        0 |               0 |            
>    0 | 
> |  11112 | 10112   | NULL   |        1 | ORF2 St        | ORF2 St        |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 1 |       1 |     10112 |      NULL |        0 |               0 |            
>    0 | 
> |  11120 | 10120   | NULL   |        1 | ATV+           | ATV+           |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 1 |       1 |     10120 |      NULL |        0 |               0 |            
>    0 | 
> |  11132 | 10132   | NULL   |        1 | ORF2 B         | ORF2 B         |    
>   |     NULL |              |         |           0 |    32768 |      32768 | 
>  32768 | 32768 | Default  |        0 |       1 |               |             
> 1 |       1 |     10132 |      NULL |        0 |               0 |            
>    0 | 
> +--------+---------+--------+----------+----------------+----------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
> 7 rows in set (0.00 sec)
> 
> mysql> select * from dtv_multiplex;
> +---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
> | mplexid | sourceid | transportid | networkid | frequency | inversion | 
> symbolrate | fec  | polarity | modulation | bandwidth | lp_code_rate | 
> transmission_mode | guard_interval | visible | constellation | hierarchy | 
> hp_code_rate | sistandard | serviceversion | updatetimestamp     |
> +---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
> |       1 |        1 |         500 |      8232 | 858000000 | a         |      
>  NULL | NULL | NULL     | NULL       | 8         | 3/4          | 8           
>       | 1/4            |       0 | qam_16        | n         | 3/4          | 
> dvb        |              2 | 2008-02-02 20:16:03 | 
> |       2 |        1 |         500 |      8232 | 514000000 | a         |      
>  NULL | NULL | NULL     | qpsk       | 8         | auto         | a           
>       | auto           |       0 | auto          | a         | auto         | 
> dvbt       |             33 | 2008-02-02 20:16:03 | 
> |       3 |        1 |         330 |      8232 | 474000000 | a         |      
>  NULL | NULL | NULL     | NULL       | 8         | 3/4          | 8           
>       | 1/4            |       0 | qam_16        | n         | 3/4          | 
> dvb        |              1 | 2008-02-02 20:16:09 | 
> |       4 |        1 |         330 |      8232 | 490000000 | a         |      
>  NULL | NULL | NULL     | qpsk       | 8         | auto         | a           
>       | auto           |       0 | auto          | a         | auto         | 
> dvbt       |             33 | 2008-02-02 20:16:09 | 
> +---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
> 4 rows in set (0.00 sec)
> 
> 
> The following statements correct the problem:
> 
> mysql> update channel set mplexid=2 where mplexid=1;
> Query OK, 4 rows affected (0.00 sec)
> Rows matched: 4  Changed: 4  Warnings: 0
> 
> mysql> update channel set mplexid=4 where mplexid=3;
> Query OK, 3 rows affected (0.00 sec)
> Rows matched: 3  Changed: 3  Warnings: 0
> 
> The data within the database is the result from importing the following 
> channel.conf file:
> # Filename:      channels.conf-AT-graz
> # Purpose:       channel configuration file for DVB-T in Graz/Austria.
> # Authors:       grml-team (grml.org), (c) Michael Prokop <[EMAIL PROTECTED]>
> # Bug-Reports:   see http://grml.org/bugs/
> # License:       This file is licensed under the GPL v2.
> # Latest change: Mon Okt 22 22:06:02 CEST 2007 [mika]
> ################################################################################
> # Usage example: 'ln -s ~/.channels/channels.conf-AT-graz 
> ~/.mplayer/channels.conf'
> ################################################################################
> ORF1:514000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:5010:5011:10101
> ORF2 
> St:514000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:5020:5021:10112
> ATV+:514000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:5040:5041:10120
> ORF2 
> B:514000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:5020:5021:10132
> ORF1:802000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:5010:5011:10101
> ORF2 
> St:802000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:5020:5021:10112
> ATV+:802000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:5040:5041:10120
> ORF2 
> B:802000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:5020:5021:10132
> PULS TV 
> AUSTRIA:490000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:3050:3051:10121
> 3SAT:490000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:3055:3056:11302
> ORF Sport 
> Plus:490000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:3060:3061:11303
> ## END OF FILE 
> #################################################################
> 
> BTW: I'm using a Pinnacle PCTV Hybrid DVB-T stick with the em2880_dvb
> driver from http://mcentral.de/wiki/index.php5/Em2880
> 
> Cheers
> 
> ** Affects: mythtv (Ubuntu)
>      Importance: Undecided
>          Status: New
> 
My understanding is that scanning is much better in trunk.  It will be entering
the archive in a few days.  Please test with that after it does and report back.

-- 
Mario Limonciello
[EMAIL PROTECTED]

-- 
Mythtv DVB-T channel scanning and importing broken
https://bugs.launchpad.net/bugs/188473
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