Error when setting opengl mode: "pygame.error: Couldn't find matching GLX visual"

[nacho692]

Environment:

pygame-ce 2.5.3.dev1 (SDL 2.30.7, Python 3.12.0)
Platform:               Linux-6.6.54-2-MANJARO-x86_64-with-glibc2.40
System:                 Linux
System Version:         #1 SMP PREEMPT_DYNAMIC Tue Oct  8 03:11:08 UTC 2024
Processor:                      SSE2: Yes       AVX2: Yes       NEON: No
Architecture:           Bits: 64bit     Linkage: ELF

Python:                 CPython 3.12.0 | packaged by Anaconda, Inc. | (main, Oct  2 2023, 17:29:18) [GCC 11.2.0]
pygame version:         2.5.3.dev1
SDL versions:           Linked: 2.30.7  Compiled: 2.30.7
SDL Mixer versions:     Linked: 2.8.0   Compiled: 2.8.0
SDL Font versions:      Linked: 2.22.0  Compiled: 2.22.0
SDL Image versions:     Linked: None    Compiled: None
Freetype versions:      Linked: 2.13.3  Compiled: 2.13.3

Display Driver:         x11 ( xwayland == False )
Mixer Driver:           pulseaudio

Other environment details, not included in print_debug_info(), that might help:

$ glxinfo -B
name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel (0x8086)
    Device: Mesa Intel(R) UHD Graphics (CML GT2) (0x9bc4)
    Version: 24.2.4
    Accelerated: yes
    Video memory: 15850MB
    Unified memory: yes
    Preferred profile: core (0x1)
    Max core profile version: 4.6
    Max compat profile version: 4.6
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics (CML GT2)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 24.2.4-arch1.0.1
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 4.6 (Compatibility Profile) Mesa 24.2.4-arch1.0.1
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 24.2.4-arch1.0.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

$ glxinfo | grep Visuals
336 GLX Visuals

• Relevant hardware

Video Card: Intel Corporation CometLake-H GT2 [UHD Graphics]

Current behavior:

Trying to enable openGL support on pygame errors out with pygame.error: Couldn't find matching GLX visual

Expected behavior:

A window with opengl support should be created

Steps to reproduce:

import pygame


def main():
    pygame.init()
    pygame.display.set_mode((640, 480), flags=pygame.OPENGL)


main()

Stack trace/error output/other error logs

pygame 2.6.1 (SDL 2.28.4, Python 3.12.0)
Hello from the pygame community. https://www.pygame.org/contribute.html
Traceback (most recent call last):
  File "/home/nacho692/repos/pyenstein/pygame_opengl.py", line 9, in <module>
    main()
  File "/home/nacho692/repos/pyenstein/pygame_opengl.py", line 6, in main
    pygame.display.set_mode((640, 480), flags=pygame.OPENGL)
pygame.error: Couldn't find matching GLX visual

What I tried, extra information

• glxgears and openGL games work
• Ran strace on the python script, it looks like it's loading libraries correctly:

$> strace python pygame_opengl.py | grep 'GLX'
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX.so.0", O_RDONLY|O_CLOEXEC <unfinished ...>
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX.so.0", O_RDONLY|O_CLOEXEC <unfinished ...>
[pid 582905] writev(5, [{iov_base="b0\3\0\3\0\0\0", iov_len=8}, {iov_base="GLX", iov_len=3}, {iov_base="\0", iov_len=1}], 3) = 12
[pid 582905] writev(5, [{iov_base="b0\3\0\3\0\0\0", iov_len=8}, {iov_base="GLX", iov_len=3}, {iov_base="\0", iov_len=1}], 3) = 12
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX_mesa.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX_mesa.so.0", O_RDONLY|O_CLOEXEC) = 19
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v3/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v2/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = 19
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX_mesa.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX_mesa.so.0", O_RDONLY|O_CLOEXEC) = 19
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = 19
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX_mesa.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX_mesa.so.0", O_RDONLY|O_CLOEXEC) = 19
[pid 582905] openat(AT_FDCWD, "/home/nacho692/miniconda3/envs/pygame/bin/../lib/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 582905] openat(AT_FDCWD, "/usr/lib/libGLX_indirect.so.0", O_RDONLY|O_CLOEXEC) = 19
[pid 582905] write(2, "pygame.error: Couldn't find matc"..., 48pygame.error: Couldn't find matching GLX visual

• Used SDL2 manually to create an openGL environment: works ok

#include <SDL2/SDL_syswm.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_video.h>

int main(int argc, char **argv)
{
    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
        SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Failed to initialize SDL: %s\n", SDL_GetError());
        return 1;
    }

    // Use OpenGL 4.3 core profile
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
    
    // Turn on double buffering with a 24bit Z buffer
    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);

         
    // Declare window variables
    int g_iWindowWidth = 800;
    int g_iWindowHeight = 600;
    bool g_bWindowFullscreen = false;

    // Create a SDL window
    SDL_Window * Window = SDL_CreateWindow("Window", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, g_iWindowWidth, g_iWindowHeight, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL | (g_bWindowFullscreen * SDL_WINDOW_FULLSCREEN));
    if (Window == NULL) {
        SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Failed to create OpenGL window: %s\n", SDL_GetError());
        SDL_Quit();
        return 1;
    }

    // Create a OpenGL Context
    SDL_GLContext Context = SDL_GL_CreateContext(Window);
    if (Context == NULL) {
        SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Failed to create OpenGL context: %s\n", SDL_GetError());
        SDL_DestroyWindow(Window);
        SDL_Quit();
        return 1;
    }
    return 0;
}

• Checked flags used for creating window

            if (!win) {
                /*open window*/
                if (hwnd != 0) {
                    win = SDL_CreateWindowFrom((void *)hwnd);
                }
                else {
                    char sdl_flags_str[255];
                    snprintf(sdl_flags_str, sizeof(sdl_flags_str), "Start: SDL_CreateWindow with flags: %u", sdl_flags);
                    PyErr_WarnEx(PyExc_Warning, sdl_flags_str,1);
                    win = SDL_CreateWindow(title, x, y, w_1, h_1, sdl_flags);
                    w_actual = w_1;
                    h_actual = h_1;
                }
                if (!win)
                    return RAISE(pgExc_SDLError, SDL_GetError());
                PyErr_WarnEx(PyExc_Warning, "Done: SDL_CreateWindow",1);

            }

$ python pygame_opengl.py
pygame-ce 2.5.3.dev1 (SDL 2.30.7, Python 3.12.0)
/home/nacho692/repos/pyenstein/pygame_opengl.py:6: Warning: Start: SDL_CreateWindow with flags: 6
  pygame.display.set_mode((640, 480), pygame.OPENGL | pygame.DOUBLEBUF)
Traceback (most recent call last):
  File "/home/nacho692/repos/pyenstein/pygame_opengl.py", line 9, in <module>
    main()
  File "/home/nacho692/repos/pyenstein/pygame_opengl.py", line 6, in main
    pygame.display.set_mode((640, 480), pygame.OPENGL | pygame.DOUBLEBUF)
pygame.error: Couldn't find matching GLX visual

Tried using the flag "6" on my own .cpp sdl program and it still works.

Found the error string itself on SDL: https://github.com/libsdl-org/SDL/blob/e9fdcf6c603f4e7776c7083b631aa6f8775566c5/src/video/x11/SDL_x11opengl.c#L708

Is there any way to debug what's going on in this method?

[nacho692]

Update:

Error is only reproduced on conda managed python, it works on system python

[nacho692]

Fixed by installing pygame using conda dependency installer instead of pip, so might be an issue with conda