mythbuntu-bugs team mailing list archive

[MarcRandolph <mrand@xxxxxxxxx>]

Howdy, and thank you for helping to improve Mythbuntu by opening this
ticket.  Since there is already a stack trace attached, I have removed
the core file that was attached to this ticket since it may contain
personal information.

I'd like to make sure I'm understanding your description properly:

1. Chanel changing on h264 IPTV with network recording sometimes confuses the backend such that it has to be restarted
2. This confusion makes the frontend appear to hang for some period of time, but it can usually exit normally
3. The attached crash report is due to you killing the front-end process manually, not it crashing on its own

I don't suppose that on one of the times that the frontend hangs, you
could attach gdb to that process and capture a trace?

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

-- 
Frontendmythfrontend.real crashed with SIGSEGV in QString::operator<()
https://bugs.launchpad.net/bugs/557265
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Status in Mythbuntu, Ubuntu derivative focused upon MythTV: Incomplete

Bug description:
h264 IPTV with Network Recorder: Frontend often hangs during channel change (getting "Partial Lock", Screen stays black) and is not able to record/livetv anymore until restarting backend. Backend itself does not crash. Frontend often does NOT crash either and can be exited normally. Sometimes has to be killed though. mythfrontend.real crashed with SIGSEGV in QString::operator<()

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: mythtv-frontend 0.23.0+fixes23983-0ubuntu0+mythbuntu2
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CrashDB: mythbuntu
Date: Wed Apr  7 13:22:57 2010
ExecutablePath: /usr/bin/mythfrontend.real
InstallationMedia: Mythbuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
Installed_mythplugins-dbg: 0.23.0+fixes23884-0ubuntu0+mythbuntu2
Installed_mythtv-dbg: 0.23.0+fixes23983-0ubuntu0+mythbuntu2
ProcCmdline: /usr/bin/mythfrontend.real --logfile /var/log/mythtv/mythfrontend.log
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x8502514 <_ZNK7QStringltERKS_+20>:	mov    0x8(%eax),%edx
 PC (0x08502514) ok
 source "0x8(%eax)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: mythtv
StacktraceTop:
 QString::operator<(QString const&) const ()
 qMapLessThanKey<QString> (key1=..., key2=...)
 QMap<QString, MythImage*>::findNode (this=0xb4f01ef4, 
 QMap<QString, MythImage*>::contains (this=0xb4f01ef4, 
 MythUIHelper::LoadCacheImage (this=0xb4f018a0, srcfile=...,
Title: mythfrontend.real crashed with SIGSEGV in QString::operator<()
UserGroups: adm admin cdrom dialout lpadmin mythtv plugdev sambashare video