Hello, I’m trying to use my TX2 to do some rendering, but with no display attached I can save some resources by not running X11. I’m trying to create an EGL context by following this example: https://devblogs.nvidia.com/egl-eye-opengl-visualization-without-x-server/ I’ve modified the code in the b…

Alright, solved my own problem. I needed to set the display in my IOutputStreamSettings object using the setEGLDisplay member. When i set it to the same display I was rendering with, everything works fine! Leaving here for posterity.

Ok, so it turns out i had to manually pick a display with eglQueryDevicesEXT and eglGetPlatformDisplayEXT. So now my rendering engine can run without X11! hooray! One more question: does argus require X11? when i try to run it without X11 running i get this: (Argus) Error NotSupported: Failed to …

Sure! The modified version of the above sample (again, derived from the blog post linked above) is this: #include <EGL/egl.h> #include <EGL/eglext.h> #include <stdio.h> static const EGLint configAttribs[] = { EGL_SURFACE_TYPE, EGL_PBUFFER_BIT, EGL_BLUE_SIZE, 8, EGL_…

Hello everywhere. By following the above example, I created an EGL Display object in a non X11 windows system which I set to Argus::OuputStream object. The problem is that when I query the EGL stream for new frames I am getting segmentation fault EGLint streamState = 0; if (!eglQueryStreamKHR(iStr…

Hi dimitris_akridas, Please share a test code so that we can build, run and reproduce the issue. It should be efficient to make a patch based on either tegra_multimedia_api sample instead of making a whole new test code.

Hello DaneLLL. Just patch the main.cpp of the cudaHistogram sample with the following. For simplicity I didn’t create the EGL display but let Argus to use the default. Maybe this is more suitable to a standalone post. 32a33 > #include "EGLGlobal.h" 125a127,138 > EGLint streamState = 0; > …

Hi, Yes. Please make a new post and share steps. It seems the patch cannot be applied by ‘patch -p1 < xxx.patch’. Please give more detail. Do you run r32.1? Also how you disable Ubuntu desktop and X11. Thanks.

Hello. I made a new post that isolates the problem from this thread. I though that the problem with the segmentation fault was due to the disabled X11 but then I realized that it happens even with the default EGLDisplay of Argus and the X11 enabled. Sorry for this. [image] Segmentation fa…

Hi wdouglass, I just wanted to thank you for sharing this, it has allowed me to do OpenGL based calculations on a HPC system that is not running an X server. In case anyone might find it useful, I’ve made a small ctypes based python module from this: [image] GitHub - j0r1/egloffscreen…

Also , Sometime’s it gives compilation errors and includes Xlib.h in egl_plaform.h , Defining the definition EGL_NO_X11 helps resolving it. for cmake : TARGET_COMPILE_DEFINITIONS(${TARGET_NAME} PUBLIC -DEGL_NO_X11)

EGL without X11

Robotics & Edge Computing Jetson Systems Jetson TX2

WayneWWW March 5, 2018, 3:45am 4

Hi wdouglass,

Could you share your final sample code? It could benefit other users who would like to use non-X11 window system.

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EGL without X11

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