Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Special Interest Groups
  3. QtonPi
  4. cross compiling qt in raspberry pi
Forum Updated to NodeBB v4.3 + New Features

cross compiling qt in raspberry pi

Scheduled Pinned Locked Moved Unsolved QtonPi
18 Posts 3 Posters 7.1k Views 2 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • EddyE Eddy
    the weird thing is after showing this error also the application is still running but no output ..its idle..i couldnt understand what exactly is going on
    

    By giving it a maximized size we force it to show on the screen.

    A Offline
    A Offline
    amruz
    wrote on last edited by
    #9

    @Eddy is it really with the problem of sizing or does it have anything to deal with the problem of compiling without x11?
    after giving showfullscreen also the same error is coming and no output display in the raspberry pi

    1 Reply Last reply
    0
    • EddyE Offline
      EddyE Offline
      Eddy
      wrote on last edited by
      #10
      does it have anything to deal with the problem of compiling without x11?
      

      It depends. I suppose your sysroot is ok and you can mount the pi, something like this?

      sudo mount -o loop,offset=62914560 /home/eddy/opt/raspberry-working-image.img /mnt/rasp-pi-rootfs
      

      How do you know the program is running on your Pi? How do you start it?
      What Pi version are you using?
      Could be good to show us all the details. Maybe someone that used the Pi recently can help out.

      Qt Certified Specialist
      www.edalsolutions.be

      A 1 Reply Last reply
      0
      • EddyE Eddy
        does it have anything to deal with the problem of compiling without x11?
        

        It depends. I suppose your sysroot is ok and you can mount the pi, something like this?

        sudo mount -o loop,offset=62914560 /home/eddy/opt/raspberry-working-image.img /mnt/rasp-pi-rootfs
        

        How do you know the program is running on your Pi? How do you start it?
        What Pi version are you using?
        Could be good to show us all the details. Maybe someone that used the Pi recently can help out.

        A Offline
        A Offline
        amruz
        wrote on last edited by amruz
        #11

        @Eddy i am using pi2 touch screen. I am running the program in the command line itself without using startx.

        when i login using the username and password in pi and then i run the program ./programname
        it is showing the "unable to query physical size..." and nothing happens. the cursor blinks there till i stop running my program in my laptop

        1 Reply Last reply
        0
        • EddyE Offline
          EddyE Offline
          Eddy
          wrote on last edited by
          #12

          @amruz
          I'm sorry, but I'm out of ideas.

          I hope someone else can help you.

          Qt Certified Specialist
          www.edalsolutions.be

          A 2 Replies Last reply
          0
          • EddyE Eddy

            @amruz
            I'm sorry, but I'm out of ideas.

            I hope someone else can help you.

            A Offline
            A Offline
            amruz
            wrote on last edited by
            #13

            @Eddy thanks for the reply..
            i also hope so

            1 Reply Last reply
            0
            • EddyE Eddy

              @amruz
              I'm sorry, but I'm out of ideas.

              I hope someone else can help you.

              A Offline
              A Offline
              amruz
              wrote on last edited by amruz
              #14

              @Eddy while debugging i am getting this message and the hour glass is just keeping on running

              Debugging starts
              Listening on port 10000
              Remote debugging from host 192.168.15.128
              Process /home/pi/qtinpitry created; pid = 925
              File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.
              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).

              i have a doubt.. this message says that the file transfer is too slow. Is it because of this reason that i am not getting the widget display in raspberry pi?
              Any suggestions on solving this problem?

              H 1 Reply Last reply
              0
              • A amruz

                @Eddy while debugging i am getting this message and the hour glass is just keeping on running

                Debugging starts
                Listening on port 10000
                Remote debugging from host 192.168.15.128
                Process /home/pi/qtinpitry created; pid = 925
                File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.
                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).

                i have a doubt.. this message says that the file transfer is too slow. Is it because of this reason that i am not getting the widget display in raspberry pi?
                Any suggestions on solving this problem?

                H Offline
                H Offline
                hardikh
                wrote on last edited by
                #15

                @amruz I am having same issue ....following qtrpi.com instruction... did u find any solution

                A 1 Reply Last reply
                0
                • H hardikh

                  @amruz I am having same issue ....following qtrpi.com instruction... did u find any solution

                  A Offline
                  A Offline
                  amruz
                  wrote on last edited by
                  #16

                  @hardikh not yet..kindly post here if u get the solution..

                  H 1 Reply Last reply
                  0
                  • A amruz

                    @hardikh not yet..kindly post here if u get the solution..

                    H Offline
                    H Offline
                    hardikh
                    wrote on last edited by
                    #17

                    @amruz yes did work just few minutes before able to do run qopenglwidget on raspberry pi my hdmi screen FHD and able to set resolution and screen size as suited for raspberry pin 7 inch screen followed https://wiki.qt.io/RaspberryPi2EGLFS and http://www.bytran.org/qtrpicrosscompile.htm now will install more module to qt than setup creator on ubuntu

                    A 1 Reply Last reply
                    0
                    • H hardikh

                      @amruz yes did work just few minutes before able to do run qopenglwidget on raspberry pi my hdmi screen FHD and able to set resolution and screen size as suited for raspberry pin 7 inch screen followed https://wiki.qt.io/RaspberryPi2EGLFS and http://www.bytran.org/qtrpicrosscompile.htm now will install more module to qt than setup creator on ubuntu

                      A Offline
                      A Offline
                      amruz
                      wrote on last edited by amruz
                      #18

                      @hardikh i actually followed the wiki page and the blog for cross compiling qt..still i am facing this error..does setting the physical height and width solved the problem?

                      i tried by setting the QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT in .bashrc but no change

                      can you mention what steps you followed for correcting it

                      1 Reply Last reply
                      0

                      • Login

                      • Login or register to search.
                      • First post
                        Last post
                      0
                      • Categories
                      • Recent
                      • Tags
                      • Popular
                      • Users
                      • Groups
                      • Search
                      • Get Qt Extensions
                      • Unsolved