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[Stephen Worthington <1639215@xxxxxxxxxxxxxxxxxx>]

I have now reverted to the previous Nvidia driver package version,
Nvidia-304.131 and mythfrontend is starting up normally.

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https://bugs.launchpad.net/bugs/1639215

Title:
  After upgrade of Nvidia 304 drivers, mythfrontend.real crashed with
  SIGSEGV in QGLFormat::openGLVersionFlags()

Status in Mythbuntu:
  New

Bug description:
  The Nvidia 304 drivers were updated by an "apt update && apt upgrade"
  to 304.132-0ubuntu0.16.04.2.  On the next reboot, mythfrontend crashed
  each time it was started.  The mythfrontend.log file always shows the
  same messages - see the attached mythfrontend.log file.

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: mythtv-frontend 2:0.28.0+fixes.20161023.7f8f168-0ubuntu0mythbuntu3 [origin: LP-PPA-mythbuntu-0.28]
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  NonfreeKernelModules: tbs5922fe nvidia
  .var.log.mythtv.mythavtest.log:
   
  .var.log.mythtv.mythccextractor.log:
   
  .var.log.mythtv.mythfilldatabase.log:
   
  .var.log.mythtv.mythjobqueue.log:
   
  .var.log.mythtv.mythlcdserver.log:
   
  .var.log.mythtv.mythmediaserver.log:
   
  .var.log.mythtv.mythshutdown.log:
   
  .var.log.mythtv.mythutil.log:
   
  .var.log.mythtv.mythwelcome.log:
   
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CrashDB: mythbuntu
  CurrentDesktop: XFCE
  Date: Sat Nov  5 00:30:56 2016
  ExecutablePath: /usr/bin/mythfrontend.real
  InstallationDate: Installed on 2012-08-25 (1531 days ago)
  InstallationMedia: Mythbuntu 12.04 "Precise Pangolin" - Release amd64 (20120425)
  Installed_mythtv_dbg: 2:0.28.0+fixes.20161023.7f8f168-0ubuntu0mythbuntu3
  ProcCmdline: /usr/bin/mythfrontend.real --syslog local7
  ProcEnviron:
   LANGUAGE=en_NZ:en
   PATH=(custom, user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_NZ.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7f33652b2f29 <_ZN9QGLFormat18openGLVersionFlagsEv+313>:	mov    (%rax),%rax
   PC (0x7f33652b2f29) ok
   source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%rax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: mythtv
  StacktraceTop:
   QGLFormat::openGLVersionFlags() () from /usr/lib/x86_64-linux-gnu/libQt5OpenGL.so.5
   MythRenderOpenGL::Create (painter=..., device=0x0) at mythrender_opengl.cpp:114
   MythMainWindow::Init (this=0x19e8210, forcedpainter=...) at mythmainwindow.cpp:1160
   main (argc=3, argv=0x7ffd29d3e418) at main.cpp:1886
  Title: mythfrontend.real crashed with SIGSEGV in QGLFormat::openGLVersionFlags()
  UpgradeStatus: Upgraded to xenial on 2016-10-08 (26 days ago)
  UserGroups: adm cdrom dip lpadmin mythtv plugdev sambashare sudo syslog video

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