cross compiling qt in raspberry pi
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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 onBy giving it a maximized size we force it to show on the screen.
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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-rootfsHow 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. -
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-rootfsHow 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.@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 -
@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? -
@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? -
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@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
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@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
@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
