Designer: "Qt Quick emulation layer crashed" on OpenSUSE

[fabi_]

I'm trying to get the designer to work but I'm having no luck. The project builds and runs fine from QtCreator, but when I go to design mode, all I'm greeted with is this dialog:

Cannot open this QML document because of an error in the QML file:
Go to error 
Line: 1: Qt Quick emulation layer crashed

The link just takes me to line 1 of the qml file and this happens on any project (examples as well as a freshly created project with no changes).
I'm running a fresh install from the unified linux installer in my home directory on OpenSUSE:

{noformat}
Qt 5.8.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 5.3.1 20160406 (Red Hat 5.3.1-6)) on "xcb" 
OS: openSUSE Leap 42.1 (x86_64) [linux version 4.1.38-50-default]

Architecture: x86_64; features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX

Environment:
  QEMU_AUDIO_DRV="pa"
  QT_IM_SWITCHER="imsw-multi"
  QT_SYSTEM_DIR="/usr/share/desktop-data"
  QT_IM_MODULE="xim"

Features: QT_NO_EXCEPTIONS

Library info:
  PrefixPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt
  DocumentationPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/doc
  HeadersPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/include
  LibrariesPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/lib
  LibraryExecutablesPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/libexec
  BinariesPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/bin
  PluginsPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/plugins
  ImportsPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/imports
  Qml2ImportsPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/qml
  ArchDataPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt
  DataPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt
  TranslationsPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/translations
  ExamplesPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/examples
  TestsPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt/tests
  SettingsPath: /home/fabian/Qt/Tools/QtCreator/lib/Qt

Standard paths [*...* denote writable entry]:
  DesktopLocation: "Desktop" */home/fabian/Desktop*
  DocumentsLocation: "Documents" */home/fabian/Documents*
  FontsLocation: "Fonts" */home/fabian/.local/share/fonts* /home/fabian/.fonts
  ApplicationsLocation: "Applications" */home/fabian/.local/share/applications* /usr/share/applications
  MusicLocation: "Music" */home/fabian/Music*
  MoviesLocation: "Movies" */home/fabian/Videos*
  PicturesLocation: "Pictures" */home/fabian/Pictures*
  TempLocation: "Temporary Directory" */tmp*
  HomeLocation: "Home" */home/fabian*
  AppLocalDataLocation: "Application Data" */home/fabian/.local/share/QtProject/qtdiag* /usr/share/QtProject/qtdiag
  CacheLocation: "Cache" */home/fabian/.cache/QtProject/qtdiag*
  GenericDataLocation: "Shared Data" */home/fabian/.local/share* /usr/share
  RuntimeLocation: "Runtime" */run/user/1000*
  ConfigLocation: "Configuration" */home/fabian/.config* /etc/xdg
  DownloadLocation: "Download" */home/fabian/Downloads*
  GenericCacheLocation: "Shared Cache" */home/fabian/.cache*
  GenericConfigLocation: "Shared Configuration" */home/fabian/.config* /etc/xdg
  AppDataLocation: "Application Data" */home/fabian/.local/share/QtProject/qtdiag* /usr/share/QtProject/qtdiag
  AppConfigLocation: "Application Configuration" */home/fabian/.config/QtProject/qtdiag* /etc/xdg/QtProject/qtdiag

File selectors (increasing order of precedence):
  en_US unix linux opensuse

Network:
  Using "OpenSSL 1.0.1i-fips 6 Aug 2014", version: 0x1000109f

Platform capabilities: ThreadedPixmaps OpenGL ThreadedOpenGL WindowMasks MultipleWindows ForeignWindows NonFullScreenWindows NativeWidgets WindowManagement SyncState RasterGLSurface SwitchableWidgetComposition

Style hints:
  mouseDoubleClickInterval: 400
  mousePressAndHoldInterval: 800
  startDragDistance: 11
  startDragTime: 500
  startDragVelocity: 0
  keyboardInputInterval: 400
  keyboardAutoRepeatRate: 30
  cursorFlashTime: 1000
  showIsFullScreen: 0
  showIsMaximized: 0
  passwordMaskDelay: 0
  passwordMaskCharacter: U+25CF
  fontSmoothingGamma: 1
  useRtlExtensions: 0
  setFocusOnTouchRelease: 0
  tabFocusBehavior: Qt::TabFocusBehavior(TabFocusAllControls) 
  singleClickActivation: 0

Additional style hints (QPlatformIntegration):
  ReplayMousePressOutsidePopup: 0

Theme:
  Available    : kde,/usr/share/xsessions/plasma5,generic
  Styles       : breeze,Oxygen,fusion,windows
  Icon theme   : breeze, breeze from /usr/share/icons,/usr/share/pixmaps

  System font  : "Noto Sans" 10

Fonts:
  General font : "Noto Sans" 10
  Fixed font   : "Oxygen Mono" 9
  Title font   : "Arial" 12
  Smallest font: "Arial" 12

Palette:
  WindowText: #ffffffff
  Button: #ff000000
  Light: #ff000000
  Midlight: #ff000000
  Dark: #ff000000
  Mid: #ff000000
  Text: #ffffffff
  BrightText: #ffffffff
  ButtonText: #ffffffff
  Base: #ff000000
  Window: #ff101010
  Shadow: #ff000000
  Highlight: #ff00316e
  HighlightedText: #ffffffff
  Link: #ff80b5ff
  LinkVisited: #ffc080ff
  AlternateBase: #ff0c0c0c
  NoRole: #ff000000
  ToolTipBase: #ff000000
  ToolTipText: #ffffffff

Screens: 2, High DPI scaling: inactive
# 0 "DVI-I-0" Depth: 24 Primary: yes
  Geometry: 1440x900+1920+0 Available: 1440x900+1920+0
  Virtual geometry: 3360x1080+0+0 Available: 3360x1053+0+0
  2 virtual siblings
  Physical size: 820x460 mm  Refresh: 59 Hz Power state: 0
  Physical DPI: 44.6049,49.6957 Logical DPI: 110,110 Subpixel_None
  DevicePixelRatio: 1 Pixel density: 0
  Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

# 1 "DVI-D-0" Depth: 24 Primary: no
  Geometry: 1920x1080+0+0 Available: 1920x1053+0+0
  Virtual geometry: 3360x1080+0+0 Available: 3360x1053+0+0
  2 virtual siblings
  Physical size: 531x299 mm  Refresh: 60 Hz Power state: 0
  Physical DPI: 91.8418,91.7458 Logical DPI: 110,110 Subpixel_None
  DevicePixelRatio: 1 Pixel density: 1
  Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

LibGL Vendor: NVIDIA Corporation
Renderer: GeForce GTX 760/PCIe/SSE2
Version: 4.5.0 NVIDIA 375.39
Shading language: 4.50 NVIDIA
Format: Version: 4.5 Profile: 2 Swap behavior: 0 Buffer size (RGB): 8,8,8 Depth buffer: 24


Plugin information:

+ Android                 4.2.1
  AutoTest                4.2.1
  AutotoolsProjectManager 4.2.1
  BareMetal               4.2.1
+ Bazaar                  4.2.1
  Beautifier              4.2.1
+ BinEditor               4.2.1
+ Bookmarks               4.2.1
+ CMakeProjectManager     4.2.1
+ CVS                     4.2.1
  ClangCodeModel          4.2.1
+ ClangStaticAnalyzer     4.2.1
+ ClassView               4.2.1
+ ClearCase               4.2.1
+ CodePaster              4.2.1
+ Core                    4.2.1
+ CppEditor               4.2.1
+ CppTools                4.2.1
+ Debugger                4.2.1
+ Designer                4.2.1
+ DiffEditor              4.2.1
  EmacsKeys               4.2.1
+ FakeVim                 4.2.1
+ GLSLEditor              4.2.1
+ GenericProjectManager   4.2.1
+ Git                     4.2.1
  HelloWorld              4.2.1
+ Help                    4.2.1
+ ImageViewer             4.2.1
  Ios                     4.2.1
+ Macros                  4.2.1
+ Mercurial               4.2.1
  ModelEditor             4.2.1
  Nim                     4.2.1
+ Perforce                4.2.1
+ ProjectExplorer         4.2.1
+ PythonEditor            4.2.1
+ QbsProjectManager       4.2.1
+ QmakeAndroidSupport     4.2.1
+ QmakeProjectManager     4.2.1
+ QmlDesigner             4.2.1
+ QmlJSEditor             4.2.1
+ QmlJSTools              4.2.1
+ QmlProfiler             4.2.1
+ QmlProjectManager       4.2.1
+ Qnx                     4.2.1
+ QtSupport               4.2.1
+ RemoteLinux             4.2.1
+ ResourceEditor          4.2.1
  ScxmlEditor             4.2.1
+ Subversion              4.2.1
+ TaskList                4.2.1
+ TextEditor              4.2.1
  Todo                    4.2.1
  UpdateInfo              4.2.1
+ Valgrind                4.2.1
+ VcsBase                 4.2.1
+ Welcome                 4.2.1
  WinRt                   4.2.1

Qt Creator 4.2.1
Based on Qt 5.8.0 (GCC 5.3.1 20160406 (Red Hat 5.3.1-6), 64 bit)
From revision 7071b61e02
Built on Jan 20 2017 01:20:42

{noformat}

Thanks for any help in advance

PS: I posted this thread a couple minutes earlier but it somehow ended up in the testing area; if any mod who sees it can please delete that one

[ambershark]

@fabi_ Do you happen to have a backtrace from the crash? It's hard to tell what might be going on otherwise.

My guess (and this is typical in linux) is that you have multiple Qt's installed and they are mixing libs. I.e. your OS, in this case OpenSUSE, installed it's Qt libraries from it's package manager, but then you also installed your own Qt.

I do this a lot with my Arch installation and it bites me sometimes. Only a guess though as it's hard to tell with no real information on the crash.

Another possibility has to do with opengl. I have had issues with Linux inside VMs that didn't have proper opengl support. Only with QtQuick stuff though. Again just a total shot in the dark as I don't have any real info to go on.

[ambershark]

@fabi_ said in Designer: "Qt Quick emulation layer crashed" on OpenSUSE:

The link just takes me to line 1 of the qml file and this happens on any project (examples as well as a freshly created project with no changes).
I'm running a fresh install from the unified linux installer in my home directory on OpenSUSE:

After re-reading your post, that line makes me think even more you are accidentally mixing Qt libs. It's very common. You can try ldd on your qt creator and see what it shows. Not guaranteed to catch it but should give you an idea. Another thing try launching your designer/creator with an LD_LIBRARY_PATH that points to your custom installed Qt.

And finally, you could try restricting access to the system Qt libs (this could affect your apps though if you're using KDE or Qt based apps).. I do a chmod 000 <qtstuff> when I want to narrow things down like this, then restore the permissions when I'm done.