[mythtv-commits] Ticket #11082: Deadlock when entering LiveTV

MythTV noreply at mythtv.org
Tue Sep 11 22:01:27 UTC 2012


#11082: Deadlock when entering LiveTV
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     Reporter:  kenni                       |      Owner:
         Type:  Bug Report - Hang/Deadlock  |     Status:  new
     Priority:  minor                       |  Milestone:  unknown
    Component:  MythTV - General            |    Version:  Master Head
     Severity:  medium                      |   Keywords:
Ticket locked:  0                           |
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 I'm seeing this deadlock regularly after upgrading to pre0.26 from
 0.25-fixes. This time I got a chance to attach gdb to the mythbackend
 process and collect a backtrace before restarting it. Unfortunately I
 didn't get the frontend backtrace as it didn't have any symbols installed.

 Symptom: When I enter LiveTV on a frontend, the screen remains black with
 no sound and no error messages of any kind.
 Performing a tcpdump on the frontend reveals that no data are received
 from the backend at this point. Looking at the backend reveals that the
 backend happily records from my HDHR to a LiveTV file, but it doesn't
 stream anything to the frontend.

 I can exit back to the main menu with no issues and start LiveTV again
 afterwards, again resulting in a black screen and the backend recording to
 a new LiveTV file and not streaming anything to the frontend.

 The backend log doesn't contain even a single line from the moment when I
 trigger LiveTV on the frontend. The frontend does produce log-entries, but
 no obvious errors are given (see attached file).

 Restarting the backend fixes the issue.

 I don't mind compiling a debug build or running with specific verbose
 options if needed - just ping me.

 Version: v0.26-rc2-2-ga625725

-- 
Ticket URL: <http://code.mythtv.org/trac/ticket/11082>
MythTV <http://code.mythtv.org/trac>
MythTV Media Center


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