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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

** Changed in: mir
     Assignee: (unassigned) => Chris Halse Rogers (raof)

** Changed in: qtbase-opensource-src (Ubuntu)
       Status: New => Invalid

** Changed in: unity8 (Ubuntu)
       Status: Incomplete => Invalid

** Tags added: black-screen

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https://bugs.launchpad.net/bugs/1550972

Title:
  Nvidia Prime graphics: unity8-dash crashed with SIGSEGV in
  glGetString()

Status in Mir:
  New
Status in mir package in Ubuntu:
  New
Status in qtbase-opensource-src package in Ubuntu:
  Invalid
Status in unity8 package in Ubuntu:
  Invalid

Bug description:
  Lenovo Y50 notebook with NVidia Prime profile. Login with unity8 shows
  black screen. Login with ubuntu works fine.

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: unity8 8.11+16.04.20160216.1-0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
  Uname: Linux 4.4.0-8-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  Date: Sun Feb 28 19:27:08 2016
  ExecutablePath: /usr/bin/unity8-dash
  InstallationDate: Installed on 2014-10-02 (514 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  ProcCmdline: unity8-dash --desktop_file_hint=/usr/share/applications/unity8-dash.desktop
  ProcEnviron:
   LANGUAGE=hu
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=hu_HU.UTF-8
   SHELL=/bin/bash
  Signal: 11
  SourcePackage: unity8
  StacktraceTop:
   glGetString () from /usr/lib/nvidia-340-updates/libGL.so.1
   QOpenGLContext::makeCurrent(QSurface*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
   ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
   ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
   start_thread (arg=0x7f1e26dc9700) at pthread_create.c:333
  Title: unity8-dash crashed with SIGSEGV in glGetString()
  UpgradeStatus: Upgraded to xenial on 2016-02-21 (7 days ago)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo

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