mythbuntu-bugs team mailing list archive

[tim davis <launchpad@xxxxxxxxxx>]

I had exactly the same problem and also found /etc/mythtv/config.xml was
zero length, but the error persisted after correcting the file.

Turned out that I didn't have xpath installed (libxml-xpath-perl) and
the mythtv-database package's postinit script suppresses errors from
xpath.

libxml-xpath-perl is a dependency of mythtv-common, but not mythtv-
database. I'm wondering now if it's simply because I tried using apt-get
upgrade initially instead of dist-upgrade.

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https://bugs.launchpad.net/bugs/1221735

Title:
  upgrade from 0.25 to 0.27 failed

Status in Mythbuntu, Ubuntu derivative focused upon MythTV:
  Invalid

Bug description:
  used 'agp-get dist-upgrade' to upgrade mythbuntu 12.04 from mythtv .25 to .27
  upgrade failed with "error, no database selected" error.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: mythtv-common 2:0.27.0+fixes.20130906.e8093db-0ubuntu0mythbuntu2 [origin: LP-PPA-mythbuntu-0.27]
  ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
  Uname: Linux 3.2.0-30-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: 2.0.1-0ubuntu13
  Architecture: amd64
  CrashDB: mythbuntu
  Date: Fri Sep  6 07:52:39 2013
  Disassembly: => 0x0:	Cannot access memory at address 0x0
  ExecutablePath: /usr/bin/mythlogserver
  InstallationMedia: Mythbuntu 12.04.1 "Precise Pangolin" - Release amd64 (20120818.1)
  Installed_mythtv_dbg: 2:0.27.0+fixes.20130906.e8093db-0ubuntu0mythbuntu2
  ProcCmdline: /usr/bin/mythlogserver --daemon --verbose general --loglevel info --quiet --syslog local7
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x0:	Cannot access memory at address 0x0
   PC (0x00000000) not located in a known VMA region (needed executable region)!
   Stack memory exhausted (SP below stack segment)
  SegvReason: executing NULL VMA
  Signal: 11
  SourcePackage: mythtv
  StacktraceTop:
   ?? ()
   QObject::disconnect(QObject const*, char const*, QObject const*, char const*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
   QObject::disconnect (this=0x7f0f2c00b6c0, receiver=0x7f0f2400b360, member=0x0) at /usr/include/qt4/QtCore/qobject.h:252
   nzmqt::PollingZMQContext::unregisterSocket (this=0x7f0f2400b360, socket_=0x7f0f2c00b6c0) at ../include/nzmqt/nzmqt.hpp:703
   nzmqt::PollingZMQContext::qt_static_metacall (_o=0x7f0f2400b360, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0x1481ac0) at moc_nzmqt.cpp:401
  Title: mythlogserver crashed with SIGSEGV in QObject::disconnect()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: audio cdrom dialout video

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