Multiscreen OpenCV goes to one screen if unplugging HDMI or DP










0














Have an issue where a multiscreen OpenCV program does not stay in multiscreen mode after unplugging a DP or HDMI cable. It just goes to one screen after re-plugging in DP or HDMI.



I have set windows with:



//![create_window]
namedWindow(window_name, WINDOW_NORMAL);
cvSetWindowProperty(window_name, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
//![create_window]
//![create_window]
namedWindow(window_name2, NORMAL); 
cvSetWindowProperty(window_name2, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);


I see this error when I re-plug the DP or HDMI in the terminal I launched the OpenCV program from:



0x7f708c813c70 void QWindowPrivate::setTopLevelScreen(QScreen*, bool) ( QScreen(0x7f708c72feb0) ): Attempt to set a screen on a child window.
QXcbConnection: XCB error: 148 (Unknown), sequence: 1391, resource id: 0, major code: 140 (Unknown), minor code: 20



Any thoughts on how to fix?



Thanks






opencv ubuntu ubuntu-16.04 nvidia







share|improve this question


























    0














    Have an issue where a multiscreen OpenCV program does not stay in multiscreen mode after unplugging a DP or HDMI cable. It just goes to one screen after re-plugging in DP or HDMI.



    I have set windows with:



    //![create_window]
    namedWindow(window_name, WINDOW_NORMAL);
    cvSetWindowProperty(window_name, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
    //![create_window]
    //![create_window]
    namedWindow(window_name2, NORMAL); 
    cvSetWindowProperty(window_name2, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);


    I see this error when I re-plug the DP or HDMI in the terminal I launched the OpenCV program from:



    0x7f708c813c70 void QWindowPrivate::setTopLevelScreen(QScreen*, bool) ( QScreen(0x7f708c72feb0) ): Attempt to set a screen on a child window.
    QXcbConnection: XCB error: 148 (Unknown), sequence: 1391, resource id: 0, major code: 140 (Unknown), minor code: 20



    Any thoughts on how to fix?



    Thanks






    opencv ubuntu ubuntu-16.04 nvidia







    share|improve this question
























      0












      0








      0







      Have an issue where a multiscreen OpenCV program does not stay in multiscreen mode after unplugging a DP or HDMI cable. It just goes to one screen after re-plugging in DP or HDMI.



      I have set windows with:



      //![create_window]
      namedWindow(window_name, WINDOW_NORMAL);
      cvSetWindowProperty(window_name, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
      //![create_window]
      //![create_window]
      namedWindow(window_name2, NORMAL); 
      cvSetWindowProperty(window_name2, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);


      I see this error when I re-plug the DP or HDMI in the terminal I launched the OpenCV program from:



      0x7f708c813c70 void QWindowPrivate::setTopLevelScreen(QScreen*, bool) ( QScreen(0x7f708c72feb0) ): Attempt to set a screen on a child window.
      QXcbConnection: XCB error: 148 (Unknown), sequence: 1391, resource id: 0, major code: 140 (Unknown), minor code: 20



      Any thoughts on how to fix?



      Thanks






      opencv ubuntu ubuntu-16.04 nvidia







      share|improve this question













      Have an issue where a multiscreen OpenCV program does not stay in multiscreen mode after unplugging a DP or HDMI cable. It just goes to one screen after re-plugging in DP or HDMI.



      I have set windows with:



      //![create_window]
      namedWindow(window_name, WINDOW_NORMAL);
      cvSetWindowProperty(window_name, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
      //![create_window]
      //![create_window]
      namedWindow(window_name2, NORMAL); 
      cvSetWindowProperty(window_name2, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);


      I see this error when I re-plug the DP or HDMI in the terminal I launched the OpenCV program from:



      0x7f708c813c70 void QWindowPrivate::setTopLevelScreen(QScreen*, bool) ( QScreen(0x7f708c72feb0) ): Attempt to set a screen on a child window.
      QXcbConnection: XCB error: 148 (Unknown), sequence: 1391, resource id: 0, major code: 140 (Unknown), minor code: 20



      Any thoughts on how to fix?



      Thanks






      opencv ubuntu ubuntu-16.04 nvidia




      opencv ubuntu ubuntu-16.04 nvidia






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 12 '18 at 23:43









      Mr OpenCVMr OpenCV

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