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** Attachment added: ".var.log.mythtv.mythbackend.log.gz"
   http://launchpadlibrarian.net/41426045/.var.log.mythtv.mythbackend.log.gz

** Attachment added: "Dependencies.txt"
   http://launchpadlibrarian.net/41426046/Dependencies.txt

** Attachment added: "Disassembly.txt"
   http://launchpadlibrarian.net/41426047/Disassembly.txt

** Attachment added: "MythTVDirectoryPermissions.txt"
   http://launchpadlibrarian.net/41426048/MythTVDirectoryPermissions.txt

** Attachment added: "ProcMaps.txt"
   http://launchpadlibrarian.net/41426049/ProcMaps.txt

** Attachment added: "ProcStatus.txt"
   http://launchpadlibrarian.net/41426050/ProcStatus.txt

** Attachment added: "Registers.txt"
   http://launchpadlibrarian.net/41426051/Registers.txt

** Attachment added: "Stacktrace.txt"
   http://launchpadlibrarian.net/41426052/Stacktrace.txt

** Attachment added: "ThreadStacktrace.txt"
   http://launchpadlibrarian.net/41426053/ThreadStacktrace.txt

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mythfrontend.real crashed with SIGSEGV in QMutex::lock()
https://bugs.launchpad.net/bugs/542787
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Status in “mythtv” package in Ubuntu: New

Bug description:
Binary package hint: mythtv

When trying to play any recorded programs, mythfrontend crashes.

Using the nvidia driver 195.36.15.  Worked fine on Karmic before upgrading to Lucid.

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Sat Mar 20 13:00:14 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/mythfrontend.real
Installed_mythplugins-dbg: 0.0
Installed_mythtv-dbg: 0.0
NonfreeKernelModules: nvidia
Package: mythtv-frontend 0.23.0~trunk23623-0ubuntu1
ProcCmdline: /usr/bin/mythfrontend.real -v playback
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_CA.UTF-8
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
SegvAnalysis:
 Segfault happened at: 0x7fb6120b78dc <_ZN6QMutex4lockEv+12>:	cmpb   $0x0,(%rdx)
 PC (0x7fb6120b78dc) ok
 source "$0x0" ok
 destination "(%rdx)" (0x00000001) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: mythtv
StacktraceTop:
 QMutex::lock() () from /usr/lib/libQtCore.so.4
 NuppelDecoder::NuppelDecoder(NuppelVideoPlayer*, ProgramInfo const&) () from /usr/lib/libmythtv-0.23.so.0
 NuppelVideoPlayer::OpenFile(bool, unsigned int, bool) () from /usr/lib/libmythtv-0.23.so.0
 PlayerContext::CreateNVP(TV*, QWidget*, TVState, unsigned long, QRect const*, bool) () from /usr/lib/libmythtv-0.23.so.0
 TV::StartPlayer(PlayerContext*, PlayerContext*, TVState) () from /usr/lib/libmythtv-0.23.so.0
Title: mythfrontend.real crashed with SIGSEGV in QMutex::lock()
Uname: Linux 2.6.32-16-generic x86_64
UserGroups: audio cdrom floppy fuse games mythtv plugdev video
XsessionErrors:
 (polkit-gnome-authentication-agent-1:3900): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (gnome-terminal:4373): Gtk-CRITICAL **: gtk_accel_map_unlock_path: assertion `entry != NULL && entry->lock_count > 0' failed
 (gnome-terminal:8485): Gtk-CRITICAL **: gtk_accel_map_unlock_path: assertion `entry != NULL && entry->lock_count > 0' failed