Problem with XCB and OpenGL

Calogero

My application is exiting with the following error whenever I try to use OpenGL

QXcbIntegration: Cannot create platform OpenGL context, neither GLX nor EGL are enabled

My desktop is Ubuntu 12.04 (32 bit). I configured Qt 5.6.0 with the following options

./configure -qt-zlib -system-libpng -system-libjpeg -platform linux-g++-32 -fontconfig -qt-xcb -nomake examples -nomake tools

This is the configure output

   Configure summary

Build type:    linux-g++-32 (i386, CPU features: none detected)

Build options:
  Configuration .......... accessibility accessibility-atspi-bridge audio-backend avx c++11 clock-gettime clock-monotonic compile_examples concurrent dbus enable_new_dtags evdev eventfd fontconfig full-config getaddrinfo getifaddrs harfbuzz iconv inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap nis opengl openssl pcre png posix_fallocate precompile_header qpa qpa reduce_exports reduce_relocations release rpath shared small-config sse2 sse3 sse4_1 sse4_2 ssse3 system-freetype system-jpeg system-png threadsafe-cloexec xcb xcb-glx xcb-plugin xcb-qt xcb-xlib xinput2 xkbcommon-qt xlib xrender zlib 
  Build parts ............ libs
  Mode ................... release
  Using sanitizer(s)...... none
  Using C++ standard ..... c++11
  Using gold linker....... no
  Using new DTAGS ........ yes
  Using PCH .............. yes
  Using LTCG ............. no
  Target compiler supports:
    SSE2/SSE3/SSSE3 ...... yes/yes/yes
    SSE4.1/SSE4.2 ........ yes/yes
    AVX/AVX2 ............. yes/no

Qt modules and options:
  Qt D-Bus ............... yes (loading dbus-1 at runtime)
  Qt Concurrent .......... yes
  Qt GUI ................. yes
  Qt Widgets ............. yes
  Large File ............. yes
  QML debugging .......... yes
  Use system proxies ..... no

Support enabled for:
  Accessibility .......... yes
  ALSA ................... no
  CUPS ................... no
  Evdev .................. yes
  FontConfig ............. yes
  FreeType ............... yes (system library)
  Glib ................... no
  GStreamer .............. no
  GTK theme .............. no
  HarfBuzz ............... yes (bundled copy)
  Iconv .................. yes
  ICU .................... no
  Image formats: 
    GIF .................. yes (plugin, using bundled copy)
    JPEG ................. yes (plugin, using system library)
    PNG .................. yes (in QtGui, using system library)
  libinput................ no
  Logging backends: 
    journald ............... no
    syslog   ............... no
  mtdev .................. no
  Networking: 
    getaddrinfo .......... yes
    getifaddrs ........... yes
    IPv6 ifname .......... yes
    libproxy.............. no
    OpenSSL .............. yes (loading libraries at run-time)
  NIS .................... yes
  OpenGL / OpenVG: 
    EGL .................. no
    OpenGL ............... desktop
    OpenVG ............... no
  PCRE ................... yes (bundled copy)
  pkg-config ............. yes 
  PulseAudio ............. no
  QPA backends: 
    DirectFB ............. no
    EGLFS ................ no
      EGLFS i.MX6 ........ no
      EGLFS i.MX6 Wayland. no
      EGLFS EGLDevice .... no
      EGLFS GBM .......... no
      EGLFS Mali ......... no
      EGLFS Raspberry Pi . no
      EGLFS X11 .......... no
    LinuxFB .............. yes
    Mir client............ no
    XCB .................. yes (bundled copy)
      EGL on X ........... no
      GLX ................ yes
      MIT-SHM ............ yes
      Xcb-Xlib ........... yes
      Xcursor ............ yes (loaded at runtime)
      Xfixes ............. yes (loaded at runtime)
      Xi ................. no
      Xi2 ................ yes
      Xinerama ........... yes (loaded at runtime)
      Xrandr ............. yes (loaded at runtime)
      Xrender ............ yes
      XKB ................ yes
      XShape ............. yes
      XSync .............. yes
      XVideo ............. yes
  Session management ..... yes
  SQL drivers: 
    DB2 .................. no
    InterBase ............ no
    MySQL ................ no
    OCI .................. no
    ODBC ................. yes (plugin)
    PostgreSQL ........... no
    SQLite 2 ............. no
    SQLite ............... yes (plugin, using bundled copy)
    TDS .................. no
  tslib .................. no
  udev ................... no
  xkbcommon-x11........... yes (bundled copy, XKB config root: /usr/share/X11/xkb)
  xkbcommon-evdev......... no
  zlib ................... yes (bundled copy)

I've googled a lot about this issue but I did not find any solution to it.
Do you have any clues on how to fix this problem?

Just to add more information, I'm linking Qt library dynamically. I created a directory containing all the necessary libraries (shared objects) and I'm setting the LD_LIBRARY_PATH to it before launching the application. I have a platforms directory at the same level of the executable with all platforms plugins.

Thanks in advance for your help!

gfxx

  OpenGL / OpenVG: 
    EGL .................. no
    OpenGL ............... desktop
    OpenVG ............... no
  PCRE ................... yes (bundled copy)

your install summary say that EGL is not istalleg ... as show you the error messages

Search all dipendancy, all library install it on UBUNTU and remake the istallation using online tool for QT5.6

Regards
Giorgio

Calogero

Giorgio thanks for your reply.

I thought GLX was enough for enabling OpenGL on Desktop.

XCB .................. yes (bundled copy)
      EGL on X ........... no
      GLX ................ yes

Anyway I tried to use EGL as opposed to GLX and I had the same issue. Here is the output of the configure in that case

Running configuration tests (phase 1)...
Done running configuration tests.
Creating qmake...
Done.
Running configuration tests (phase 2)...
Done running configuration tests.

   Configure summary

Build type:    linux-g++-32 (i386, CPU features: none detected)

Build options:
  Configuration .......... accessibility accessibility-atspi-bridge audio-backend avx c++11 clock-gettime clock-monotonic compile_examples concurrent dbus egl eglfs egl_x11 enable_new_dtags evdev eventfd fontconfig full-config getaddrinfo getifaddrs harfbuzz iconv inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap nis opengl openssl pcre png posix_fallocate precompile_header qpa qpa reduce_exports reduce_relocations release rpath shared small-config sse2 sse3 sse4_1 sse4_2 ssse3 system-freetype system-jpeg system-png threadsafe-cloexec xcb xcb-plugin xcb-qt xcb-xlib xinput2 xkbcommon-qt xlib xrender zlib 
  Build parts ............ libs
  Mode ................... release
  Using sanitizer(s)...... none
  Using C++ standard ..... c++11
  Using gold linker....... no
  Using new DTAGS ........ yes
  Using PCH .............. yes
  Using LTCG ............. no
  Target compiler supports:
    SSE2/SSE3/SSSE3 ...... yes/yes/yes
    SSE4.1/SSE4.2 ........ yes/yes
    AVX/AVX2 ............. yes/no

Qt modules and options:
  Qt D-Bus ............... yes (loading dbus-1 at runtime)
  Qt Concurrent .......... yes
  Qt GUI ................. yes
  Qt Widgets ............. yes
  Large File ............. yes
  QML debugging .......... yes
  Use system proxies ..... no

Support enabled for:
  Accessibility .......... yes
  ALSA ................... no
  CUPS ................... no
  Evdev .................. yes
  FontConfig ............. yes
  FreeType ............... yes (system library)
  Glib ................... no
  GStreamer .............. no
  GTK theme .............. no
  HarfBuzz ............... yes (bundled copy)
  Iconv .................. yes
  ICU .................... no
  Image formats: 
    GIF .................. yes (plugin, using bundled copy)
    JPEG ................. yes (plugin, using system library)
    PNG .................. yes (in QtGui, using system library)
  libinput................ no
  Logging backends: 
    journald ............... no
    syslog   ............... no
  mtdev .................. no
  Networking: 
    getaddrinfo .......... yes
    getifaddrs ........... yes
    IPv6 ifname .......... yes
    libproxy.............. no
    OpenSSL .............. yes (loading libraries at run-time)
  NIS .................... yes
  OpenGL / OpenVG: 
    EGL .................. yes
    OpenGL ............... desktop
    OpenVG ............... no
  PCRE ................... yes (bundled copy)
  pkg-config ............. yes 
  PulseAudio ............. no
  QPA backends: 
    DirectFB ............. no
    EGLFS ................ yes
      EGLFS i.MX6 ........ no
      EGLFS i.MX6 Wayland. no
      EGLFS EGLDevice .... no
      EGLFS GBM .......... no
      EGLFS Mali ......... no
      EGLFS Raspberry Pi . no
      EGLFS X11 .......... yes
    LinuxFB .............. yes
    Mir client............ no
    XCB .................. yes (bundled copy)
      EGL on X ........... yes
      GLX ................ no
      MIT-SHM ............ yes
      Xcb-Xlib ........... yes
      Xcursor ............ yes (loaded at runtime)
      Xfixes ............. yes (loaded at runtime)
      Xi ................. no
      Xi2 ................ yes
      Xinerama ........... yes (loaded at runtime)
      Xrandr ............. yes (loaded at runtime)
      Xrender ............ yes
      XKB ................ yes
      XShape ............. yes
      XSync .............. yes
      XVideo ............. yes
  Session management ..... yes
  SQL drivers: 
    DB2 .................. no
    InterBase ............ no
    MySQL ................ no
    OCI .................. no
    ODBC ................. yes (plugin)
    PostgreSQL ........... no
    SQLite 2 ............. no
    SQLite ............... yes (plugin, using bundled copy)
    TDS .................. no
  tslib .................. no
  udev ................... no
  xkbcommon-x11........... yes (bundled copy, XKB config root: /usr/share/X11/xkb)
  xkbcommon-evdev......... no
  zlib ................... yes (bundled copy)

I'm building Qt 5.6 from scratch, I'm not using the online installer.

Calogero

I just found that the problem was that the libqxcb-glx-integration plugin was not found. Putting xcbglintegrations plugins folder at the same level of the application fixed the issue.