[mythtv-commits] Ticket #13269: Active EIT scanning stops after failed tuning

[MythTV]

#13269: Active EIT scanning stops after failed tuning
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 Reporter:  jmwislez              |          Owner:  dekarl
     Type:  Bug Report - General  |         Status:  new
 Priority:  minor                 |      Milestone:  unknown
Component:  MythTV - EIT          |        Version:  v29.1
 Severity:  medium                |     Resolution:
 Keywords:                        |  Ticket locked:  0
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Comment (by Kevin Rolfes):

 I'm also seeing this behavior with a USA terrestrial channel on the edge
 of reception. It's easily reproduced so I spent some time troubleshooting
 it. It occurs with both version 29 and the git trunk, locally compiled
 under Debian 9 on an Intel D2700MUD, using the HDHomeRun HDHR4-2US tuner.
 When the EIT scanner chooses the marginal channel and it fails to obtain a
 signal lock, that EIT scanner is stopped and will never scan again. Since
 there are two tuners on the HDHR4-2US, scanning continues with the
 remaining tuner until it runs into the same problem. Restarting the
 backend is necessary to resume EIT scanning.

 I am attaching a system log showing the messages obtained after running
 "mythbackend --setverbose all ; mythbackend --setloglevel debug" although
 I did remove the scheduler messages for the sake of brevity. Channel 54_1
 is the marginal channel, resulting in system event TUNING_SIGNAL_TIMEOUT
 and ultimately the clearing of the flag EITScannerRunning. This log is
 from the git trunk version, with the mythconverg database cleared and
 setup from scratch before launching the newly compiled backend for the
 first time.

 I'm happy to repeat this test with additional debugging or patches
 applied.

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Ticket URL: <https://code.mythtv.org/trac/ticket/13269#comment:2>
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