Unknown module(s) in QT: quickcontrols2

sierdzio

You need to enable the vc4 gpu driver in raspi-config. I think it is listed under experimental section.

DarkPatate

7 Advanced options > A7 GL Driver > G1 GL (Full KMS)

(I din't find reference to VC4 GPU Driver in my raspi-config)

I don't now if it's that? But it didn't work, even after reboot.

SGaist

Modify LD_LIBRARY_PATH so that it also point to that folder.

sierdzio

@DarkPatate said in Unknown module(s) in QT: quickcontrols2:

I don't now if it's that? But it didn't work, even after reboot.

Looks like it. Shame it didn't work. Try the other options maybe, but they are less likely to work.

DarkPatate

@SGaist now all the librairy are found. But there is a missing plugin:

pi@raspberrypi:~/Documents/appliUR $ ./appliUR 
This application failed to start because it could not find or load the Qt platform plugin "eglfs"
in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, xcb.

Reinstalling the application may fix this problem.
Aborted

So I tried to create a sym link to the EGL lib too:

sudo ln -s /opt/vc/lib/libbrcmEGL.so /opt/vc/lib/libEGL.so

But it didn't work. It's almost working!

@sierdzio I tried all options, without success.

sierdzio

Eglfs platform plugin is a Qt plugin, located in <qt dir>/plugins/platforms.

Most probably your Qt was compiled for XCB (X11) only. Try running your app with -platform xcb argument (but expect low performance from this plugin...).

DarkPatate

@sierdzio said in Unknown module(s) in QT: quickcontrols2:

-platform xcb

I got the same pb with xcb. I tried also linuxfb and minimal, without success :/

sierdzio

I see. Well, that answer won't make you happy, perhaps, but: try following the "RPI eglfs" (Google it) guide and cross compile Qt yourself.

If definitely works, I've used Qt, with Qt Quick, many times. There are issues with the drivers, sure. But in general it works.

DarkPatate

@sierdzio sorry for the very late reply, I was so busy. I tried this solution long time ago but I failed. I will try again and let you know :)

sierdzio

Here's the link by the way https://wiki.qt.io/RaspberryPi2EGLFS

I recommend getting the source tarball instead of using git: https://download.qt.io/archive/qt/5.10/5.10.1/single/ Less to download, no need to run init-repository - in general less hassle (unless you want to contribute to Qt, but that's not the case here).