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[Bug 1017577] Re: mythbackend crashed with SIGSEGV in QMutex::lock()

 

We really do appreciate you opening this ticket to help improve
Mythbuntu, but it needs to be closed for a number of reasons. The
biggest one is that upstream has moved on to a new version and believes
this to be fixed. Could you please verify if this issue still exists in
the latest version?

Please do not let the closing of this ticket dissuade you from opening a
new ticket if this (or any other) problem occurs with the newer
versions.

** Changed in: mythbuntu
       Status: New => Expired

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https://bugs.launchpad.net/bugs/1017577

Title:
  mythbackend crashed with SIGSEGV in QMutex::lock()

Status in Mythbuntu, Ubuntu derivative focused upon MythTV:
  Expired

Bug description:
  Ran a channel scan in mythbackend setup and crash occured when exiting
  setup.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: mythtv-backend 2:0.25.0+fixes.20120622.73bc45e-0ubuntu0mythbuntu4 [origin: LP-PPA-mythbuntu-0.25]
  ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
  Uname: Linux 3.2.0-25-generic x86_64
  NonfreeKernelModules: nvidia
  .var.log.mythtv.mythavtest.log:
   
  .var.log.mythtv.mythccextractor.log:
   
  .var.log.mythtv.mythjobqueue.log:
   
  .var.log.mythtv.mythlcdserver.log:
   
  .var.log.mythtv.mythmediaserver.log:
   
  .var.log.mythtv.mythshutdown.log:
   
  .var.log.mythtv.mythtranscode.log:
   
  .var.log.mythtv.mythutil.log:
   
  .var.log.mythtv.mythwelcome.log:
   
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  CrashDB: mythbuntu
  Date: Mon Jun 25 10:29:46 2012
  ExecutablePath: /usr/bin/mythbackend
  InstallationMedia: Mythbuntu 12.04 "Precise Pangolin" - Release amd64 (20120425)
  Installed_mythtv_dbg: 0.0
  ProcCmdline: /usr/bin/mythbackend --syslog local7 --user mythtv
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x7f69bbd7d93e <_ZN6QMutex4lockEv+14>:	mov    (%rdi),%rbx
   PC (0x7f69bbd7d93e) ok
   source "(%rdi)" (0x65006e00650067) not located in a known VMA region (needed readable region)!
   destination "%rbx" ok
   Stack memory exhausted (SP below stack segment)
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: mythtv
  StacktraceTop:
   QMutex::lock() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
   JobQueue::DoMetadataLookupThread(int) () from /usr/lib/libmythtv-0.25.so.0
   JobQueue::MetadataLookupThread(void*) () from /usr/lib/libmythtv-0.25.so.0
   ?? () from /usr/lib/nvidia-current/libGL.so.1
   start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
  Title: mythbackend crashed with SIGSEGV in QMutex::lock()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: audio cdrom dialout video

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References