@cbratschi Can you check if you code is creating OpenGL context that actually is using vc4/v3d GPU driver and is not using llvmpipe software rasterizer in mesa? You can check this by printing glGetString(GL_RENDERER) after creating EGL context. When mesa uses real VideoCore GPU it will should have ...

//#include <GL/gl.h> #include "GLES2/gl2.h" Maybe you had to install these libraries/headers. I tried to compile the code using another SD card with older Buster (I replaced it with bigger/faster one) and the compiler didn't found gbm.h. It means I had to install it later and I don't remember when ...

And getting the same error:

* failed to add service - already in use?

Any ideas what could cause this?

Save the code as drm-gbm-mod.c Then gcc -o drm-gbm drm-gbm-mod.c -ldrm -lgbm -lEGL -lGL -I/usr/include/libdrm (the comment at the first line of the code) Yes, already tried this: drm-gbm-mod.c:13:10: fatal error: EGL/egl.h: Datei oder Verzeichnis nicht gefunden #include <EGL/egl.h> It compiles with...

I am using a similar code to access OpenGL ES without any window server and I am always getting: failed to add service - already in use? This happens in the eglGetDisplay(displayType) call where the gbm_create_device(device) result is used. Tried to re-arranged the code but no different. I can get t...

I am trying to get aminogfx-gl to run on Pi 4 but the OpenGL ES 2 code hangs while swapping buffers and afterwards a reboot is needed to use OpenGL again. Otherwise it hangs on EGL init. https://github.com/cbratschi/aminogfx-gl The same code works fine on Pi 3. While reading this thread I thought th...

I am running into the same issue. So far I am using a single egl_render output buffer but on 1080p@60 a 29.7 fps video does not run smoothly enough on a RPi 3. There are tearing effects and the OpenGL thread can only deliver about 27 frames per second. I tried a lot of code changes but I guess more ...

Follow-up to my previous post:

The plymouth package was the root cause!

Just uninstall it:

sudo apt-get remove plymouth

This also uninstalls the mountall package but seems to have no further dependencies. After that the screen is black again during the boot process.

Modifying /boot/cmdline.txt was working so far but after applying those modifications I updated to the latest Jessie Lite version and now a few message are still shown. 1) Upgrade: The following packages have been kept back: plymouth The following packages will be upgraded: bind9-host curl e2fslibs ...