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  1. Qt
  2. QTBUG-66668

REG->5.11Beta1 : Windows: Quick nano browser example crashes

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Details

    • Bug
    • Resolution: Fixed
    • P1: Critical
    • 5.11.0 RC 1, 6.2
    • 5.11.0 Beta 1
    • WebEngine
    • None
    • Windows 10, MSVC17/64bit
    • e5e0bb2631e6b0e207a6c98e1a328c8da958be9c 099cdde2717aa09800e2915eac2d2c76e6216d5f

    Description

      [5440:10416:0226/094132.047:ERROR:gl_surface_wgl.cc(372)] wglCreatePbufferARB not available.
[5440:10416:0226/094132.047:ERROR:gl_surface_qt.cpp(751)] Requested OpenGL implementation is not supported. Implementation: 1

      This happens for both -opengl desktop and -opengl dynamic builds. There's an ordering problem in how we initialize our OpenGL extensions.

      The logic in GpuInit::InitializeInProcess() (see https://code.woboq.org/qt5/qtwebengine/src/3rdparty/chromium/gpu/ipc/service/gpu_init.cc.html ) is the following:

        if (!gl::init::InitializeGLNoExtensionsOneOff()) {
    VLOG(1) << "gl::init::InitializeGLNoExtensionsOneOff failed";
    return;
  }
// ..
  gpu::CollectContextGraphicsInfo(&gpu_info_);
  gpu_feature_info_ = gpu::ComputeGpuFeatureInfo(gpu_info_, command_line);
// ..
  if (!gl::init::InitializeExtensionSettingsOneOffPlatform()) {
    VLOG(1) << "gl::init::InitializeExtensionSettingsOneOffPlatform failed";
  }

      THat is, we first initialize OpenGL without extensions, then try to query GPU features, and then only initialize extensions.

      However, ComputeGpuFeatureInfo does create an OpenGL surface for querying the extensions, and on Windows this OpenGL context requires wglCreatePbufferARB to be available (see GLSurfaceQtWGL::Initialize).

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        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-67524 WebEngine broken on Windows (Q_UNREACHABLE in gl_surface_qt.cpp)

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-66941 Windows: Quick nano browser example crashes on startup

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Activity

            People

              qt_webengine_team Qt WebEngine Team
              kleint Friedemann Kleint
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              Dates

                Created:
                Updated:
                Resolved: