mythbuntu-bugs team mailing list archive

[Matthias <mat@xxxxxxxxxxx>]

Thank you very much.

Your description for 1 and 2 is correct.
I would like to add that the problem occurs pretty often, that means I can change channel about three to five times max.

Regarding 3: The crash report was due to a frontend crash.
After I updated earlier yesterday to the latest build no frontend crash has occured anymore. 

I am now able to shut down the frontend with normal means when the
channel changing problem occurs. Beforehands the OSD would inform me
that by the time I should have a lock already.

The Problem seems to be located solely on the backend side.
I dont know what a gdb is yet, but I'll try to figure out and post it here. I guess you'd rather want information on the backend process though?

-- 
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