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  1. Qt
  2. QTBUG-95003

null EGLConfig config

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    • Platform/s:
      Linux/Yocto

      Description

      Hello everyone!

      After upgrading to QT 5.15.5 my application can't find the EGLconfig: "Cannot find EGLConfig, returning null config".

      Application debug output

      QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/var/volatile/tmp/runtime-root'
      qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_emu", "eglfs_kms_egldevice", "eglfs_kms")
      qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_kms", "eglfs_emu", "eglfs_kms_egldevice")
      qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_kms"
      qt.qpa.eglfs.kms: Loading KMS setup from "/etc/qt5/eglfs_kms_cfg.json"
      qt.qpa.eglfs.kms: Requested configuration (some settings may be ignored):
              headless: false
              hwcursor: false
              pbuffers: true
              separateScreens: false
              virtualDesktopLayout: 0
              outputs: QMap(("VGA1", QMap(("mode", QVariant(QString, "off"))("name", QVariant(QString, "VGA1")))))
      qt.qpa.eglfs.kms: New DRM/KMS via GBM integration created
      qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_kms"
      qt.qpa.eglfs.kms: platformInit: Opening DRM device
      qt.qpa.eglfs.kms: GBM: Using DRM device "/dev/dri/card0" specified in config file
      qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
      qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
      qt.qpa.eglfs.kms: Initalizing event reader for device 0x4c3de0 fd 5
      qt.qpa.eglfs.kms: Querying EGLDisplay
      ...
      Cannot find EGLConfig, returning null config
      qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
      qt.qpa.eglfs.kms: Setting mode for screen UNKNOWN1
      qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1 touch devices, 0 pending handler(s)
      qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
      qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
      

      I've made some comparing between 5.12.9 (working) and 5.15.5 versions.

      Just the device was changed.

      // not working
      qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
      qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
      qt.qpa.eglfs.kms: Initalizing event reader for device 0x4c3de0 fd 5
      qt.qpa.eglfs.kms: Querying EGLDisplay
      
      // working
      qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
      qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
      qt.qpa.eglfs.kms: Initalizing event reader for device 0x2bef0 fd 5
      qt.qpa.eglfs.kms: Querying EGLDisplay
      

      crct id 55? QtPlatformScreen is different.

      // not working
      qt.qpa.eglfs.kms: Output UNKNOWN1 can use 4 planes: 35 38 43 48
      qt.qpa.eglfs.kms: Chose plane 35 for output UNKNOWN1 (crtc id 55) (may not be applicable)
      qt.qpa.eglfs.kms: Using plain OpenGL mouse cursor
      qt.qpa.eglfs.kms: No EDID data for output "UNKNOWN1"
      qt.qpa.eglfs.kms: Sorted screen list: QVector(OrderedScreen(QPlatformScreen=0x4e1430 ("UNKNOWN1") : 2147483647 / QPoint(0,0) / primary: false))
      qt.qpa.eglfs.kms: Adding QPlatformScreen 0x4e1430 ( "UNKNOWN1" ) to QPA with geometry QRect(0,0 1024x600) and isPrimary= false
      qt.qpa.input: evdevkeyboard: Using device discovery
      qt.qpa.input: udev device discovery for type QFlags<QDeviceDiscovery::QDeviceType>(Device_Keyboard)
      
      // working
      qt.qpa.eglfs.kms: Output UNKNOWN1 can use 4 planes: 35 38 43 48
      qt.qpa.eglfs.kms: Output eglfs plane is: 35
      qt.qpa.eglfs.kms: Using plain OpenGL mouse cursor
      qt.qpa.eglfs.kms: No EDID data for output "UNKNOWN1"
      qt.qpa.eglfs.kms: Sorted screen list: QVector(OrderedScreen(QPlatformScreen=0x494e8 ("UNKNOWN1") : 2147483647 / QPoint(0,0) / primary: false))
      qt.qpa.eglfs.kms: Adding QPlatformScreen 0x494e8 ( "UNKNOWN1" ) to QPA with geometry QRect(0,0 1024x600) and isPrimary= false
      Unable to query physical screen size, defaulting to 100 dpi.
      To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
      qt.qpa.input: evdevkeyboard: Using device discovery
      

      This part about QSurface is totally missing.

      Created context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize -1, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize -1, stencilBufferSize -1, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 1, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) with config:
              EGL_BUFFER_SIZE: 24
              EGL_ALPHA_SIZE: 0
              EGL_BLUE_SIZE: 8
              EGL_GREEN_SIZE: 8
              EGL_RED_SIZE: 8
              EGL_DEPTH_SIZE: 0
              EGL_STENCIL_SIZE: 0
              EGL_CONFIG_CAVEAT: 12344
              EGL_CONFIG_ID: 5
              EGL_LEVEL: 0
              EGL_MAX_PBUFFER_HEIGHT: 0
              EGL_MAX_PBUFFER_PIXELS: 0
              EGL_MAX_PBUFFER_WIDTH: 0
              EGL_NATIVE_RENDERABLE: 1
              EGL_NATIVE_VISUAL_ID: 875713112
              EGL_NATIVE_VISUAL_TYPE: 12344
              EGL_SAMPLES: 0
              EGL_SAMPLE_BUFFERS: 0
              EGL_SURFACE_TYPE: 4
              EGL_TRANSPARENT_TYPE: 12344
              EGL_TRANSPARENT_BLUE_VALUE: 0
              EGL_TRANSPARENT_GREEN_VALUE: 0
              EGL_TRANSPARENT_RED_VALUE: 0
              EGL_BIND_TO_TEXTURE_RGB: 0
              EGL_BIND_TO_TEXTURE_RGBA: 0
              EGL_MIN_SWAP_INTERVAL: 1
              EGL_MAX_SWAP_INTERVAL: 1
      

      So my question is, what did you change in this direction between those upgrades?

      Thanks,
      Andy

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            Assignee:
            lagocs Laszlo Agocs
            Reporter:
            andy99 A -
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              Updated:

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