Error on running Qt 5 example project on embedded arm target



  • I have downloaded Qt 5.7 open source version. Then configured and built it to run on an embedded target with below mentioned configuration options.

    ./configure -xplatform linux-arm-hisiv400-linux-gnueabi-g++ -opensource -skip qtquickcontrols -skip qtwebchannel -skip qtactiveqt -skip qtandroidextras -skip qtdeclarative -skip qtimageformats -skip qtmacextras -skip qtserialport -skip qtx11extras -skip qtxmlpatterns -skip qtconnectivity -skip qtdoc -skip qtgraphicaleffects -skip qtlocation -skip qtmultimedia -skip qtsensors -skip qttools -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwinextras -verbose -no-gif -no-libjpeg -no-mtdev -no-sql-db2 -no-sql-ibase -no-sql-mysql -no-xcb -qt-freetype -fontconfig -no-harfbuzz -no-xinput2 -no-xcb-xlib -no-pulseaudio -no-alsa -no-nis -no-cups -no-iconv -no-icu -no-eglfs -no-openssl -shared -qpa linuxfb -confirm-license

    I was able to configure it successfully and after built the Qt 5.7. After this, copied generated libraries from <loc_Qt_source>/qt_base/lib/ to my embedded target. Also copied one of the GUI example project analogclock (qtbase/examples/gui/analogclock) to embedded target. In the embedded target set the library path correctly. Then tried running this example project using command shown below.

    ./analogclock -platform linuxfb

    But I am getting below error on running this example project.

    Failed to open framebuffer /dev/fb0 (Operation not permitted)
    linuxfb: Failed to initialize screen
    Segmentation fault

    Could any one please let me know what might be wrong here and how to fix this issue.

    Regards,
    Kraj.


  • Lifetime Qt Champion

    Hi and welcome to devnet,

    Did you check that you have the rights to access that device ?



  • @SGaist Thank you for your reply. Yes, I have the rights to access the device.

    Regards,
    Krishnaraj


  • Lifetime Qt Champion

    Just to be sure we are talking about the same thing: I meant /deb/fb0 on the target not the target itself.


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