[SOLVED] Qt6 crosscompiled for pi4 raspi os 64 FAILED TO CREATE EGL CONTEXT

Harlock21

Hi all, this is the config summary:

OpenGL:
Desktop OpenGL ....................... no
opengles2 ............................ yes
opengles3 ............................ yes
OpenGL ES 3.1 ........................ yes
OpenGL ES 3.2 ........................ yes
Vulkan ................................. yes
Session Management ..................... yes
Features used by QPA backends:
evdev .................................. yes
libinput ............................... yes
HiRes wheel support in libinput ........ no
INTEGRITY HID .......................... no
mtdev .................................. yes
tslib .................................. yes
xkbcommon .............................. yes
X11 specific:
xlib ................................. yes
XCB Xlib ............................. yes
EGL on X11 ........................... yes
xkbcommon-x11 ........................ yes
xcb-sm ............................... no
QPA backends:
DirectFB ............................... no
eglfs .................................. no
EGLFS details:
EGLFS OpenWFD ........................ no
EGLFS i.Mx6 .......................... no
EGLFS i.Mx6 Wayland .................. no
EGLFS RCAR ........................... no
EGLFS EGLDevice ...................... no
EGLFS GBM ............................ no
EGLFS VSP2 ........................... no
EGLFS Mali ........................... no
EGLFS Raspberry Pi ................... no
EGLFS X11 ............................ no
LinuxFB ................................ yes
VNC .................................... yes
VK_KHR_display ......................... yes
QNX:
lgmon ................................ no
IMF .................................. no
XCB:
Using system-provided xcb-xinput ..... no
GL integrations:
GLX Plugin ......................... no
XCB GLX .......................... no
EGL-X11 Plugin ..................... yes
Windows:
Direct 2D ............................ no
Direct 2D 1.1 ........................ no
DirectWrite .......................... no
DirectWrite 3 ........................ no

Harlock21

Two things: when I was deploying all the plugin renderers were lacking and the sysroot had bad symlinks.
Thanks all :)

Zavar

Hi @Harlock21, i'm having the same problems: (Failed to create RHI and Failed to initialize graphics backend for OpenGL). Could you share your method to fix this?

SGaist

@Zavar hi and welcome to devnet,

@Harlock21 wrote what was wrong in their last post as well as how they fixed it.

Zavar

Hi, @SGaist! I'm deploying on Ubuntu 22.04, which is not supported by linuxdeloyqt, so what I'm trying to do is using linuxdeploy and qt-plugin, which is kinda more manually than lixnuxdeployqt. I'm having the same issue and considering it as lacking of plugins/libraries. But there no tutorial to do this, and AI is not very helpful

SGaist

@Zavar If you want to see which plugin is missing, start your application with the QT_DEBUG_PLUGINS environment variable set to 1.

Zavar

@SGaist I try QT DEBUG PLUGINS and I didn't see anything wrong. Then I tried running with variable QT_QPA_PLATFORM=xcb helped fix the issue. Can you help me understand how this works?

SGaist

@Zavar which Linux distribution are you running ? With which desktop environment ?

Zavar

@SGaist I'm using Ubuntu24.04 with GNOME, Wayland disabled (Qt version 6.8.3)

SGaist

How did you disable Wayland ?

Zavar

@SGaist I did it by sudo nano /etc/gdm3/custom.conf -> WaylandEnable=false

SGaist

Did you check whether you have somewhere in your environnement something that sets the QPA platform to wayland ?