here is what I did.

I updated everything to latest, than I installed Qt5 and some related packages:

pacman -S gcc make qt5-base qt5-declarative qt5-imageformats qt5-multimedia qt5-quickcontrols qt5-script qt5-svg qt5-tools qt5-webkit qt5-xmlpatterns python python-pyqt5

than I downloaded mlbrowser for Rasbian source code (downloaded to desktop, copied by scp) and ran:


just as I was instructed in readme.md.

Everything compiles just fine, and even runs if executed like this:

./mlbrowser -platform linuxfb http://www.raspberry.org

but if I run mlbrowser like this:

./mlbrowser -platform eglfs http://www.raspberry.org

I get the following error:

This application failed to start because it could not find or load the Qt platform plugin "eglfs".

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

Reinstalling the application may fix this problem.
Aborted (core dumped)

which is nonsense, because eglfs is listed as available. Also the following command:

ls -l /usr/lib/qt/plugins/platforms/

gives me the following list

total 1452
-rwxr-xr-x 1 root root 249820 May 27 22:01 libqeglfs.so
-rwxr-xr-x 1 root root 216844 May 27 22:01 libqkms.so
-rwxr-xr-x 1 root root 154872 May 27 22:01 libqlinuxfb.so
-rwxr-xr-x 1 root root  30520 May 27 22:01 libqminimal.so
-rwxr-xr-x 1 root root 134188 May 27 22:01 libqminimalegl.so
-rwxr-xr-x 1 root root 100920 May 27 22:01 libqoffscreen.so
-rwxr-xr-x 1 root root 593160 May 27 22:01 libqxcb.so[/code]

so libqeglfs.so actually exists and is executable.

How can I debug this error? What tools should I use in this case? Or maybe this is a known issue with known solution I just was not able to find?

P.S. I've just found out that:

  • with minimalegl platform application terminates with the following error:

    Opened display 0xcdf6a0
    libEGL warning: DRI2: xcb_connect failed  
    libEGL warning: DRI2: xcb_connect failed  
    Could not initialize egl display
    EGL error
    Aborted (core dumped)
  • with linuxfb platform keyboard input is completely ignored.

Not sure if this is relevant, since I need eglfs.

1 Answer 1


Link GPU eglfs binaries so Qt can get to them in system path

sudo ln -s /opt/vc/lib/libEGL.so /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0
sudo ln -s /opt/vc/lib/libGLESv2.so /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0

Install the leandog apt server in your sources

echo "deb http://apt.leandog.com/ jessie main" | sudo tee --append /etc/apt/sources.list
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BDCBFB15

Install packages

sudo apt-get update

sudo apt-add-repository ppa:ci-train-ppa-service/landing-011
sudo apt-add-repository ppa:ubuntu-raspi2/ppa
sudo apt-add-repository ppa:a-j-buxton/qt5-raspi-eglfs
sudo apt-get update

sudo apt-get install libraspberrypi-dev

cd /usr/lib

sudo ln -s libGLESv2.so libGLESv2.so.2

Install your desired Qt libraries and modules.

Run your app with arguments: -platform eglfs

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