Opened 17 months ago

Closed 17 months ago

#13449 closed Bug Report - General (fixed)

Channel Scan fails when no delivery system has been selected

Reported by: Klaas de Waal Owned by: Klaas de Waal
Priority: minor Milestone: 31.0
Component: MythTV - Mythtv-setup Version: Master Head
Severity: medium Keywords: DVB delivery system
Cc: Stuart Auchterlonie Ticket locked: no


A mythtv-setup Channel Scan with a DVB tuner card that does not have a delivery system selected fails with a "Failed to open card" message in the "Scan Type" selection field. In the log output the following message appears:

2019-04-17 21:12:42.500642 E  CardUtil[1]: No delivery system selected for capturecard 1

This typically happens when mythtv-setup is run with a v30 database; for DVB cards field capturecard/inputname is then set to "DVBInput" which is not a delivery system such as "DVB-T2".

This problem is avoided by selecting first a delivery system, with "2. Capture Cards" / <select capture card> / <select card type> / "Delivery system". However, this is not obvious for even the experts, let alone the casual users.

The way forward is to implement the following for DVB cards:

  • if there is no valid delivery system then
    • get the current delivery system from the device
    • if that is DVB-T and DVB-T2 is supported then change to DVB-T2
    • if that is DVB-S and DVB-S2 is supported then change to DVB-S2
    • update the database with the new delivery system

N.B. In mythbackend it is already done like this, but without modifying the database. This allows a mythbackend compiled from master to run with a v30 database.

Change History (1)

comment:1 Changed 17 months ago by Klaas de Waal <kdewaal@…>

Resolution: fixed
Status: assignedclosed

In a7f4441f71/mythtv:

Update capturecard with default delivery system if not defined.

Fixes #13449

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