[mythtv-commits] Ticket #11870: Channel scanning deadlock with DVB

MythTV noreply at mythtv.org
Sat Sep 5 22:14:00 UTC 2020

#11870: Channel scanning deadlock with DVB
 Reporter:  Rune Petersen <rune@…>      |          Owner:  Klaas de Waal
     Type:  Bug Report - Hang/Deadlock  |         Status:  assigned
 Priority:  minor                       |      Milestone:  32.0
Component:  MythTV - Channel Scanner    |        Version:  0.27-fixes
 Severity:  medium                      |     Resolution:
 Keywords:                              |  Ticket locked:  0

Comment (by Klaas de Waal):

 The deadlock has been reproduced. This can only happen when the "Test
 Decryptability" option is selected when doing a channel scan. This option
 is by default off as it greatly increases the channel scanning time and
 the results are not very reliable anyway.

 The problem is not really in the "big lock" m_lock but more in the locking
 order itself. This can be fixed in MPEGStreamData::ProcessEncryptedPacket
 by releasing the m_encryptionLock before calling the
 HandleEncryptionStatus of all listeners.
 In case of channel scanning the listener is the
 This fix is being tested and the deadlock has not yet appeared again.

Ticket URL: <https://code.mythtv.org/trac/ticket/11870#comment:5>
MythTV <http://www.mythtv.org>
MythTV Media Center

More information about the mythtv-commits mailing list