Could not initialize egl display: No eglGetPlatformDisplay for GBM

  • i have got some problem when i run my application on eglfs platform
    the output:
    root@root:~# ./hello -platform eglfs
    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", "eglfs_mali", "eglfs_x11")
    qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_kms", "eglfs_emu", "eglfs_mali", "eglfs_x11")
    qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_kms"
    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.input: static device discovery for type QFlagsQDeviceDiscovery::QDeviceType(Device_DRM|Device_VideoMask)
    qt.qpa.input: doing static device discovery for "/dev/dri/card0"
    qt.qpa.input: Found matching devices ("/dev/dri/card0")
    qt.qpa.eglfs.kms: Found the following video devices: ("/dev/dri/card0")
    qt.qpa.eglfs.kms: Using "/dev/dri/card0"
    qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
    qt.qpa.eglfs.kms: Creating GBM device for file descriptor 4 obtained from "/dev/dri/card0"
    qt.qpa.eglfs.kms: Querying EGLDisplay
    qt.qpa.eglfs.kms: No eglGetPlatformDisplay for GBM, falling back to eglGetDisplay
    Could not initialize egl display

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