Black screen when using develop branch core with custom OpenGL libretro frontend

[whlxdev]

Hi, I’m working on my own simple libretro frontend with an OpenGL-based video implementation, and I’m seeing the following behavior with mupen64plus-libretro-nx:

• The core built from the master branch works fine (audio and video).
• The core built from the develop branch runs, but no video is displayed — the screen stays completely black.
• There are no crashes or obvious errors; it simply does not render any video.

About my frontend:

• Minimal libretro frontend implementation
• OpenGL used for rendering
• Works correctly with other cores and with mupen64plus-libretro-nx from master

I’ve checked the usual things (valid OpenGL context, video callbacks, etc.), but I can’t figure out what changed in develop that causes this behavior. I'm using gliden64.

Could someone point me in the right direction or let me know if there were any recent changes in develop related to video or OpenGL rendering?

Thanks!

[Yarny0]

Hi, I'm experiencing the same symptoms. I'm using NixOS 25.11 with X11. I tested with Plasma6 and with IceWM and desktop environments -- the problem seems independent of that.

To test/reproduce the problem, I'm using this ROM (flames.rom, sha224 74143e0e9cced7cfb0ccddf4f71ce75c8fc6954496dfcc6a1fe3ce0a), but other ROMs also exhibit the issue.

Note: My distribution packages the develop-branch, that's why I stumbled upon that issue.

Some possibly helpful observations:

• The problem occurs on my desktop (lspci says Intel Corporation CometLake-S GT2 [UHD Graphics 630] [8086:9bc5] (rev 05)), but not on my laptop (lspci says Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)).

• I did a bisection with the develop-branch: At least for my hardware, 680e033 is the offending commit!

• Changing the "RDP Plugin" in Core Options from default GLideN64 to any other value (ParaLLEl-RDP or Angrylion) and restarting RetroArch fixes the problem (with the significant drawback that GLideN64 specific features are no longer available). Switching back to GLideN64 exposes the issue again.

• Whether the issue shows or not depends on the content of ~/.config/retroarch/system/Mupen64plus/shaders/GLideN64.2ae9cd4.OpenGL.shaders. If that file does not exist when RetroArch and the mupen64plus core are started, it will be created. The issue will only show if the file is created by a version based on the offending commit noted above. So it is possible to avoid the issue by letting an old version create the file, then use a new version of mupen64plus.

Dear @whlxdev: Can you confirm my observations for your situation? Particularly (if you're in a position to compile other commits): Is "my" offending commit also "your" offending commit? Then it's very likely we're observing the same issue.

Notifying @m4xw (author of the offending commit): Maybe you have an idea on what's causing this issue?

I haven't but the slightest clue about GLiceN64 and OpenGL in general and as such don't know how to fix this (short of reverting the commit, of course). If someone feels more well versed but can't reproduce the issue (as it seems to be hardware-dependent): I'm willing to gather more data and/or test patches on my hardware to help fix this issue.

For the record, here's the output of retroarch --verbose while the issue shows on my machine

[INFO] [Config]: Looking for config in: "/home/user/.config/retroarch/retroarch.cfg".
[INFO] [Config]: Looking for config in: "/home/user/.retroarch.cfg".
[WARN] [Config]: Using skeleton config "/nix/store/asw8arm3l6rmcnc1zvq3qv67lmnvc4ca-retroarch-bare-1.21.0/etc/retroarch.cfg" as base for a new config file.
[WARN] [Config]: Created new config file in: "/home/user/.config/retroarch/retroarch.cfg".
GameMode ERROR: D-Bus error: Could not call method 'QueryStatus' on 'com.feralinteractive.GameMode': The name com.feralinteractive.GameMode was not provided by any .service files
[WARN] [GameMode]: GameMode cannot be enabled on this system ("D-Bus error: Could not call method 'QueryStatus' on 'com.feralinteractive.GameMode': The name com.feralinteractive.GameMode was not provided by any .service files.") https://github.com/FeralInteractive/gamemode needs to be installed.
[WARN] [Config]: GameMode unsupported - disabling..
[WARN] Using old --libretro behavior. Setting libretro_directory to "/nix/store/pp7c2dxv1q64rfpxp0c9nig0yknp8zij-retroarch-with-cores-1.21.0/lib/retroarch/cores" instead.
[INFO] === Build =======================================
[INFO] CPU Model Name: Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4 SSE42 AES AVX AVX2 
[INFO] Version: 1.21.0
[INFO] Built: Jan  1 1980
[INFO] =================================================
[INFO] [Input]: Found input driver: "x".
[INFO] [Core]: Loading dynamic libretro core from: "/nix/store/5i4jzmyf29i02bm0nhmpz3xmikiiwz92-libretro-mupen64plus-next-0-unstable-2025-11-14/lib/retroarch/cores/mupen64plus_next_libretro.so"
[INFO] [Config]: Loading config: "/home/user/.config/retroarch/retroarch.cfg".
[INFO] [Config]: Appending config: "/nix/store/yc3lw3b9ky1s13p17gqqckr7f7dpjsy5-declarative-retroarch.cfg".
GameMode ERROR: D-Bus error: Could not call method 'QueryStatus' on 'com.feralinteractive.GameMode': The name com.feralinteractive.GameMode was not provided by any .service files
[INFO] [Overrides]: Redirecting save file to "/home/user/.config/retroarch/saves/Mupen64Plus-Next/flames.srm".
[INFO] [Overrides]: Redirecting save state to "/home/user/.config/retroarch/states/Mupen64Plus-Next/flames.state".
[INFO] [Environ]: GET_CORE_OPTIONS_VERSION.
[INFO] [Environ]: RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2.
[INFO] [Environ]: SET_CONTROLLER_INFO.
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: GET_LOG_INTERFACE.
[INFO] [Environ]: GET_PERF_INTERFACE.
[INFO] [Environ]: SET_PIXEL_FORMAT: XRGB8888.
[INFO] [Environ]: GET_RUMBLE_INTERFACE.
[libretro INFO] mupen64plus: Using full mem base
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Content]: Loading content file: "/home/user/tmp/rom2/flames.rom".
[INFO] [Environ]: SET_HW_RENDER, context type: glcore.
[INFO] Requesting core OpenGL context (3.3).
[libretro INFO] mupen64plus: Goodname: Christmas Flame Demo by Halley's Comet Software (PD)
[libretro INFO] mupen64plus: Name: Flame Demo 12/25/01
[libretro INFO] mupen64plus: MD5: BA145D51B681EF4432DB59C1DA703047
[libretro INFO] mupen64plus: CRC: B484EB31 D44B1928
[libretro INFO] mupen64plus: Imagetype: .z64 (native)
[libretro INFO] mupen64plus: Rom size: 237440 bytes (or 0 Mb or 0 Megabits)
[libretro INFO] mupen64plus: ClockRate = F
[libretro INFO] mupen64plus: Version: 1444
[libretro INFO] mupen64plus: Manufacturer: 0
[libretro INFO] mupen64plus: Cartridge_ID: 0
[libretro INFO] mupen64plus: Country: Demo
[libretro INFO] mupen64plus: PC = 80000400
[libretro INFO] mupen64plus: Save type: 0
[INFO] [SRAM]: Skipping SRAM load.
[INFO] [Core]: Version of libretro API: 1, Compiled against API: 1
[INFO] [Core]: Geometry: 640x480, Aspect: 1.333, FPS: 60.00, Sample rate: 44100.00 Hz.
[INFO] [Video]: Set video size to: 1440x1080.
[INFO] [Video]: Using HW render, glcore driver forced.
[INFO] [Video]: "glcore" saved as cached driver.
[ERROR] [Wayland]: Failed to connect to Wayland server.
[INFO] [GLX]: GLX_EXT_swap_control_tear supported.
[INFO] [GLCore]: Found GL context: "x".
[INFO] [GLCore]: Detecting screen resolution: 5120x1440.
[INFO] [GLX]: X = 0, Y = 0, W = 1440, H = 1080.
[INFO] [GLX]: Creating context for requested version 3.3.
[INFO] [GLX]: Creating shared HW context.
[INFO] [GLX]: Found swap function: glXSwapIntervalEXT.
[INFO] [GLCore]: Initializing HW render (1024x1024).
[INFO] [GLCore]: Max texture size: 16384 px, renderbuffer size: 16384 px.
[INFO] [GLCore]: Vendor: Intel, Renderer: Mesa Intel(R) UHD Graphics 630 (CML GT2).
[INFO] [GLCore]: Version: 4.6 (Core Profile) Mesa 25.2.6.
[INFO] [GLCore]: Using resolution 1440x1080.
[INFO] [X11]: Master pointer, 2 "Virtual core pointer"
[INFO] [Joypad]: Found joypad driver: "udev".
[INFO] [GLCore]: Loading stock shader.
[INFO] [slang]: Building pass #0 (N/A)
[INFO] [GLCore]: Not using frame history.
[INFO] [GLCore]: Not using framebuffer feedback.
[INFO] [DBus]: Suspended screensaver via DBus.
[INFO] [Video]: Found display server: "x11".
[INFO] [Environ]: SET_INPUT_DESCRIPTORS:
[INFO] [Audio]: Set audio input rate to: 44100.00 Hz.
[INFO] [PulseAudio]: Requested 24576 bytes buffer, got 18432.
[INFO] [Audio]: Started synchronous audio driver.
[INFO] [ALSA] Using ALSA version 1.2.14
[INFO] [Microphone]: Initialized microphone driver.
[INFO] [Display]: Found display driver: "glcore".
[ERROR] [Core Info]: Failed to write core info cache file: "/nix/store/cjx99i2wa4bapww1r4k6f6hca7939a2a-libretro-core-info-1.22.0/share/retroarch/cores/core_info.cache".
[INFO] [Environ]: SET_SUBSYSTEM_INFO.
[INFO] [Config]: Saved new config to "/home/user/.config/retroarch/retroarch.cfg".
[INFO] [Playlist]: Loading history file: "/home/user/.config/retroarch/content_history.lpl".
[INFO] [Playlist]: Loading history file: "/home/user/.config/retroarch/content_music_history.lpl".
[INFO] [Playlist]: Loading history file: "/home/user/.config/retroarch/content_video_history.lpl".
[INFO] [Playlist]: Loading history file: "/home/user/.config/retroarch/content_image_history.lpl".
[INFO] [Playlist]: Loading favorites file: "/home/user/.config/retroarch/content_favorites.lpl".
[INFO] [Playlist]: Written to playlist file: "/home/user/.config/retroarch/content_history.lpl".
Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
Qt depends on a UTF-8 locale, and has switched to "C.UTF-8" instead.
If this causes problems, reconfigure your locale. See the locale(1) manual
for more information.
[libretro INFO] mupen64plus: Game controller 0 (Standard controller) has a Memory pak plugged in
[libretro INFO] mupen64plus: Game controller 1 (Standard controller) has nothing plugged in
[libretro INFO] mupen64plus: Game controller 2 (Standard controller) has nothing plugged in
[libretro INFO] mupen64plus: Game controller 3 (Standard controller) has nothing plugged in
[libretro INFO] mupen64plus: Using CIC type X102
[INFO] [Environ]: SET_MEMORY_MAPS.
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[INFO] [Environ]: SYSTEM_DIRECTORY: "/home/user/.config/retroarch/system".
[libretro INFO] mupen64plus: Initializing 4 RDRAM modules for a total of 8 MB
[libretro INFO] mupen64plus: Starting R4300 emulator: Dynamic Recompiler
[libretro INFO] mupen64plus: Init new dynarec

[igorcafe]

I reproduced the black screen once, but now I can only reproduce some artifacts (screenshots below).

Doing a bisect I found the same offending commit @Yarny0 found.

I couldn't build from master because it wouldn't compile before this commit 5abd4b6 on linux x64.

Building from 680e033 and later

Building from 5abd4b6 to 222acbd

Tested with:

retroarch -L mupen64plus_next_libretro.so SM64.zip -c retroarch_default.cfg

I noticed that pressing f for fullscreen is also causing a crash. I'm not sure if it's something wrong with the core too...

[m4xw]

crash on fullscreen is a context reset issue iirc. The other issue you are hitting is that i disabled the gl extension without bumping the shader cache version (for my own reasons i try to keep them 1:1), clearing the shader cache should resolve that issue.

@Yarny0 old shader cache should NOT work on new core, you might mix something up

[Yarny0]

Dear @m4xw, thanks for your hints.

clearing the shader cache should resolve that issue

Does that refer to the files in ~/.config/retroarch/system/Mupen64plus/shaders/ ?

Just to be sure I'm not confusing things here, I tried again, and I'm documenting here very precisely (sorry if I'm being too verbose -- I hope it helps in assessing the situation).

• Everything tested using RetroArch 1.22.2.
• Before each test run, the directory ~/.config/retroarch is completely removed, so it gets repopulated by retroarch and mupen64plus on startup.
• Again testing with this ROM showing snowflakes.

This is what I observed:

• With mupen64plus compiled from 680e033 , no ROM video is shown.
• With mupen64plus compiled from 222acbd , snowflakes are shown.

In both cases, RetroArch isself is able to show the centered banner 'flames' and 'Nintendo - Nindento 64 (Mupen64Plus-Next)', and the information 'Saved config to "/home/user/.config/retroarch/retroarch.cfg"' in the lower left corner of the window.

old shader cache should NOT work on new core

Again, here is precisely what I did:

• Remove the directory ~/.config/retroarch completely.

• Start RetroArch with the core compiled from 222acbd and with flames.rom.

• Snowflakes are shown.

• Close RetroArch with Alt+F4.

• sha224sum ~/.config/retroarch/system/Mupen64plus/shaders/* says

  db260445b3201c3bddc96ef9c31c2355b756dcaada5624bb1bf57095  /home/user/.config/retroarch/system/Mupen64plus/shaders/GLideN64.2ae9cd4.OpenGL.keys
  3be83a49bbd2e39c21e596d462df6b7a689c02ad1f119169fc807ddb  /home/user/.config/retroarch/system/Mupen64plus/shaders/GLideN64.2ae9cd4.OpenGL.shaders
  

• (This time, ~/.config/retroarch is not removed or otherwise altered before RetroArch is invoked again.)

• Start RetroArch with the core compiled from 680e033 and with flames.rom.

• Snowflakes are shown.

So indeed I can work around the bug by letting an old version create the files in ~/.config/retroarch/system/Mupen64plus/shaders before playing games with the new version.

I can gather log files or test patches with my hardware if that might help understanding the issue at hand.

[m4xw]

If you get no video its some shader error.
Dual source blending has some bugged codepaths, in my testing it was more stable without it.

You can review all uses here https://github.com/search?q=repo%3Alibretro%2Fmupen64plus-libretro-nx%20dual_source_blending%20&type=code

Guess coverage may rely on it and maybe the functions arent working in upstream code if oneof the ext_fetch ones is available, you could try forcing that off or enable the shader compile checks and see whats up

[m4xw]

Got a list of your supported gl extensions?

[Yarny0]

Guess coverage may rely on it and maybe the functions arent working in upstream code if oneof the ext_fetch ones is available, you could try forcing that off or enable the shader compile checks and see whats up

I'm not sure if I understood that sentence fully. However, I patched the core (based on the latest develop commit) with the following patch

Patch

diff --git i/GLideN64/src/Graphics/OpenGLContext/opengl_GLInfo.cpp w/GLideN64/src/Graphics/OpenGLContext/opengl_GLInfo.cpp
index c11ccad..f2197c8 100644
--- i/GLideN64/src/Graphics/OpenGLContext/opengl_GLInfo.cpp
+++ w/GLideN64/src/Graphics/OpenGLContext/opengl_GLInfo.cpp
@@ -198,6 +198,7 @@ void GLInfo::init() {
 	texture_barrierNV = Utils::isExtensionSupported(*this, "GL_NV_texture_barrier");
 
 	ext_fetch = Utils::isExtensionSupported(*this, "GL_EXT_shader_framebuffer_fetch") && (!isGLESX || ext_draw_buffers_indexed);
+	LOG(LOG_VERBOSE, "GLInfo::init: ext_fetch=%d", ext_fetch?1:0);
 	n64DepthWithFbFetch = ext_fetch && !imageTexturesInterlock;
 	eglImage = (Utils::isEGLExtensionSupported("EGL_KHR_image_base") || Utils::isEGLExtensionSupported("EGL_KHR_image"));
 	ext_fetch_arm =  Utils::isExtensionSupported(*this, "GL_ARM_shader_framebuffer_fetch") && !ext_fetch;
@@ -252,6 +253,8 @@ void GLInfo::init() {
 #ifdef GL_DEBUG
 	glDebugMessageCallback(on_gl_error, nullptr);
 	glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, GL_TRUE);
-	glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
+	// The following line would fail with this error:
+	// GLideN64/src/Graphics/OpenGLContext/GLFunctions.h:230:55: error: 'SGL_DEBUG_OUTPUT_SYNCHRONOUS' was not declared in this scope; did you mean 'GL_DEBUG_OUTPUT_SYNCHRONOUS'?
+	//glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
 #endif
 }
diff --git i/GLideN64/src/Log.h w/GLideN64/src/Log.h
index c6d006b..d049e1d 100644
--- i/GLideN64/src/Log.h
+++ w/GLideN64/src/Log.h
@@ -8,7 +8,7 @@
 #define LOG_VERBOSE 4
 #define LOG_APIFUNC 5
 
-#define LOG_LEVEL LOG_NONE
+#define LOG_LEVEL LOG_VERBOSE
 
 #include "Types.h"
 #include <cstdio>
diff --git i/Makefile w/Makefile
index 97c1609..8cbba60 100644
--- i/Makefile
+++ w/Makefile
@@ -633,6 +633,7 @@ COREFLAGS += -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -D__LIBRETRO__ -DUSE
 ifeq ($(DEBUG), 1)
    CPUOPTS += -O0 -g
    CPUOPTS += -DOPENGL_DEBUG
+   CPUOPTS += -DGL_DEBUG
 else
    CPUOPTS += -DNDEBUG -fsigned-char -ffast-math -fno-strict-aliasing -fomit-frame-pointer -fvisibility=hidden
 ifneq ($(platform), libnx)

Then recompiled the core with these Makefile flags: DEBUG=1, GL_DEBUG=1, V=1. Some might be useless, but that's how I managed to generate a lot of debug output.

Output of retroarch --verbose --libretro mupen64plus_next_libretro.so flames.rom

[INFO] [Config] Looking for config in: "/tmp/retroarch-home/.config/retroarch/retroarch.cfg".
[INFO] [Config] Looking for config in: "/tmp/retroarch-home/.retroarch.cfg".
[INFO] [Config] Using skeleton config "/nix/store/kf98r6s4w1kfdhvhj2zz2w63yp09c7vq-retroarch-bare-1.22.2/etc/retroarch.cfg" as base for a new config file.
[INFO] [Config] Created new config file in: "/tmp/retroarch-home/.config/retroarch/retroarch.cfg".
GameMode ERROR: D-Bus error: Could not call method 'QueryStatus' on 'com.feralinteractive.GameMode': The name com.feralinteractive.GameMode was not provided by any .service files
[WARN] [GameMode] GameMode cannot be enabled on this system ("D-Bus error: Could not call method 'QueryStatus' on 'com.feralinteractive.GameMode': The name com.feralinteractive.GameMode was not provided by any .service files.") https://github.com/FeralInteractive/gamemode needs to be installed.
[WARN] [Config] GameMode unsupported - disabling...
[WARN] Using old --libretro behavior. Setting libretro_directory to "/nix/store/5ra3p5086k0l91qrk6shhal600c5n9y5-retroarch-with-cores-1.22.2/lib/retroarch/cores" instead.
[INFO] === Build =======================================
[INFO] CPU Model Name: Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4 SSE42 AES AVX AVX2 
[INFO] Version: 1.22.2
[INFO] Built: Jan  1 1980
[INFO] =================================================
[INFO] [Input] Found input driver: "x".
[ERROR] [Core info] Failed to write core info cache file: "/nix/store/nwshlb3pshhypdv63bq4zjf4f4i3azh8-libretro-core-info-1.22.2/share/retroarch/cores/core_info.cache".
[INFO] [Environ] SET_SUBSYSTEM_INFO.
[INFO] [Core] Loading dynamic libretro core from: "/nix/store/cxz20n8m9w0ic6dk16ncxdyzpahn5xkq-libretro-mupen64plus-next-0-unstable-2026-01-20/lib/retroarch/cores/mupen64plus_next_libretro.so".
[INFO] [Config] Loading config: "/tmp/retroarch-home/.config/retroarch/retroarch.cfg".
[INFO] [Config] Appending config: "/nix/store/fv2sxcnzjpf30cqncga4ldskxn7m9xcd-declarative-retroarch.cfg".
GameMode ERROR: D-Bus error: Could not call method 'QueryStatus' on 'com.feralinteractive.GameMode': The name com.feralinteractive.GameMode was not provided by any .service files
[INFO] [Override] Redirecting save file to "/tmp/retroarch-home/.config/retroarch/saves/Mupen64Plus-Next/flames.srm".
[INFO] [Override] Redirecting save state to "/tmp/retroarch-home/.config/retroarch/states/Mupen64Plus-Next/flames.state".
[INFO] [Environ] SET_SUBSYSTEM_INFO.
[INFO] [Environ] GET_CORE_OPTIONS_VERSION.
[INFO] [Environ] SET_CORE_OPTIONS_V2.
[INFO] [Environ] SET_CONTROLLER_INFO.
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_LOG_INTERFACE.
[INFO] [Environ] GET_PERF_INTERFACE.
[INFO] [Environ] SET_PIXEL_FORMAT: XRGB8888.
[INFO] [Environ] GET_RUMBLE_INTERFACE.
[libretro INFO] mupen64plus: Using full mem base
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Content] Loading content file: "/nix/store/6vys6y8xdl64mdspd1g5z9bx6sr7nmca-flames.rom/flames.rom".
[INFO] [Environ] SET_HW_RENDER, context type: glcore.
[INFO] [HW] Requesting core OpenGL context (3.3).
[libretro INFO] mupen64plus: Goodname: Christmas Flame Demo by Halley's Comet Software (PD)
[libretro INFO] mupen64plus: Name: Flame Demo 12/25/01
[libretro INFO] mupen64plus: MD5: BA145D51B681EF4432DB59C1DA703047
[libretro INFO] mupen64plus: CRC: B484EB31 D44B1928
[libretro INFO] mupen64plus: Imagetype: .z64 (native)
[libretro INFO] mupen64plus: Rom size: 237440 bytes (or 0 Mb or 0 Megabits)
[libretro INFO] mupen64plus: ClockRate = F
[libretro INFO] mupen64plus: Version: 1444
[libretro INFO] mupen64plus: Manufacturer: 0
[libretro INFO] mupen64plus: Cartridge_ID: 0
[libretro INFO] mupen64plus: Country: Demo
[libretro INFO] mupen64plus: PC = 80000400
[libretro INFO] mupen64plus: Save type: 0
[INFO] [SRAM] Skipping SRAM load.
[INFO] [Core] Version of libretro API: 1, Compiled against API: 1
[INFO] [Core] Geometry: 640x480, Aspect: 1.333, FPS: 60.00, Sample rate: 44100.00 Hz.
[INFO] [Video] Set video size to: 1440x1080.
[INFO] [Video] Using HW render, glcore driver forced.
[INFO] [Video] "glcore" saved as cached driver.
[ERROR] [Wayland] Failed to connect to Wayland server.
[INFO] [GLX] GLX_EXT_swap_control_tear supported.
[INFO] [GLCore] Found GL context: "x".
[INFO] [GLCore] Detecting screen resolution: 5120x1440.
[INFO] [GLX] Creating context for requested version 3.3.
[INFO] [GLX] Creating shared HW context.
[INFO] [GLX] Found swap function: glXSwapIntervalEXT.
[INFO] [GLCore] Initializing HW render (1024x1024).
[INFO] [GLCore] Max texture size: 16384 px, renderbuffer size: 16384 px.
[INFO] [GLCore] Vendor: Intel, Renderer: Mesa Intel(R) UHD Graphics 630 (CML GT2).
[INFO] [GLCore] Version: 4.6 (Core Profile) Mesa 25.2.6.
[INFO] [GLCore] Using resolution 1440x1080.
[INFO] [X11] Master pointer, 2 "Virtual core pointer".
[INFO] [Input] Found joypad driver: "udev".
[INFO] [GLCore] Using Slang shader backend.
[INFO] [GLCore] Loading stock shader.
[INFO] [GLCore] Building pass #0 (N/A)
[INFO] [GLCore] Not using frame history.
[INFO] [GLCore] Not using framebuffer feedback.
[INFO] [DBus] Suspended screensaver via DBus.
[INFO] [Video] Found display server: "x11".
[INFO] [Environ] SET_INPUT_DESCRIPTORS.
[INFO] [Audio] Set audio input rate to: 44100.00 Hz.
[INFO] [PulseAudio] Requested 24576 bytes buffer, got 18432.
[INFO] [Audio] Started synchronous audio driver.
[INFO] [ALSA] Using ALSA version 1.2.15.1
[INFO] [Microphone] Initialized microphone driver.
[INFO] [Display] Found display driver: "glcore".
[INFO] [Environ] SET_SUBSYSTEM_INFO.
[INFO] [Config] Saved config to "/tmp/retroarch-home/.config/retroarch/retroarch.cfg".
[INFO] [Playlist] Loading favorites file: "/tmp/retroarch-home/.config/retroarch/playlists/builtin/content_favorites.lpl".
[INFO] [Playlist] Loading history file: "/tmp/retroarch-home/.config/retroarch/playlists/builtin/content_history.lpl".
[INFO] [Playlist] Loading history file: "/tmp/retroarch-home/.config/retroarch/playlists/builtin/content_image_history.lpl".
[INFO] [Playlist] Loading history file: "/tmp/retroarch-home/.config/retroarch/playlists/builtin/content_music_history.lpl".
[INFO] [Playlist] Loading history file: "/tmp/retroarch-home/.config/retroarch/playlists/builtin/content_video_history.lpl".
[INFO] [Playlist] Written to file: "/tmp/retroarch-home/.config/retroarch/playlists/builtin/content_history.lpl".
Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
Qt depends on a UTF-8 locale, and has switched to "C.UTF-8" instead.
If this causes problems, reconfigure your locale. See the locale(1) manual
for more information.
[libretro INFO] mupen64plus: Game controller 0 (Standard controller) has a Memory pak plugged in
[libretro INFO] mupen64plus: Game controller 1 (Standard controller) has nothing plugged in
[libretro INFO] mupen64plus: Game controller 2 (Standard controller) has nothing plugged in
[libretro INFO] mupen64plus: Game controller 3 (Standard controller) has nothing plugged in
[libretro INFO] mupen64plus: Using CIC type X102
[INFO] [Environ] SET_MEMORY_MAPS.
[libretro INFO] CommonAPIImpl_common.cpp:203, "RomOpen"[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[libretro INFO] mupen64plus_DisplayWindow.cpp:64, "[GlideN64]: _setAttributes"[libretro INFO] mupen64plus_DisplayWindow.cpp:83, "[GlideN64]: Create setting videomode 640x480"[libretro INFO] opengl_GLInfo.cpp:48, "OpenGL major version: 4"[libretro INFO] opengl_GLInfo.cpp:49, "OpenGL minor version: 6"[libretro INFO] opengl_GLInfo.cpp:52, "OpenGL vendor: Intel"[libretro INFO] opengl_GLInfo.cpp:72, "OpenGL renderer: Mesa Intel(R) UHD Graphics 630 (CML GT2)"[libretro INFO] opengl_GLInfo.cpp:201, "GLInfo::init: ext_fetch=1"[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[INFO] [Environ] GET_SYSTEM_DIRECTORY: "/tmp/retroarch-home/.config/retroarch/system".
[libretro INFO] glsl_Utils.cpp:48, "shader_compile error: 0:63(22): error: A single interface variable cannot be declared as both input and output
"[libretro INFO] glsl_Utils.cpp:83, "Error in fragment shader"[libretro INFO] glsl_Utils.cpp:94, "#version 460 core 
# define IN in
# define OUT out
# define texture2D texture
  #define STVEC(pos) (step(float(pos), vec4(0.5,1.5,2.5,3.5)) - step(float(pos), vec4(-0.5,0.5,1.5,2.5))) 
const mediump int mipmapTileWidth = 256;
uniform sampler2D uTex0;		
uniform sampler2D uTex1;		
uniform lowp vec4 uFogColor;	
uniform lowp vec4 uCenterColor;
uniform lowp vec4 uScaleColor;	
uniform lowp vec4 uBlendColor;	
uniform lowp vec4 uEnvColor;	
uniform lowp vec4 uPrimColor;	
uniform lowp float uPrimLod;	
uniform lowp float uK4;		
uniform lowp float uK5;		
uniform lowp int uAlphaCompareMode;	
uniform lowp ivec2 uFbMonochrome;		
uniform lowp ivec2 uFbFixedAlpha;		
uniform lowp int uEnableAlphaTest;		
uniform lowp int uCvgXAlpha;			
uniform lowp int uAlphaCvgSel;			
uniform lowp float uAlphaTestValue;	
un"[libretro INFO] glsl_Utils.cpp:94, "iform lowp int uDepthSource;			
uniform highp float uPrimDepth;		
uniform mediump vec2 uScreenScale;		
uniform highp vec2 uTexClamp[2];		
uniform highp vec2 uTexWrap[2];		
uniform lowp vec2 uTexWrapEn[2];		
uniform lowp vec2 uTexMirrorEn[2];		
uniform lowp vec2 uTexClampEn[2];		
uniform highp vec2 uTexSize[2];		
uniform highp vec2 uShiftScale[2];		
uniform highp vec2 uTexOffset[2];		
uniform highp vec2 uHDRatio[2];		
uniform highp vec2 uTexCoordOffset;	
uniform highp vec2 uBilinearOffset;	
uniform highp vec2 uCacheOffset[2];	
uniform lowp int uUseTexCoordBounds;	
uniform highp vec4 uTexCoordBounds;	
uniform lowp int uScreenSpaceTriangle;	
highp vec2 texCoord0;					
highp vec2 texCoord1;					
highp vec2 tcData0[5];					
highp vec2 tcData1[5];					
uniform lowp int uCvgDest;				
uniform lowp"[libretro INFO] glsl_Utils.cpp:94, " int uBlendAlphaMode;		
lowp float cvg;		
uniform lowp ivec4 uBlendMux1;		
uniform lowp int uForceBlendCycle1;
uniform sampler2D uDepthTex;		
uniform lowp int uAlphaDitherMode;	
uniform lowp int uColorDitherMode;	
uniform lowp int uRenderTarget;	
uniform mediump vec2 uDepthScale;	
noperspective IN lowp vec4 vShadeColorNoperspective;	
IN lowp vec4 vShadeColor;		
IN highp vec2 vTexCoord;		
IN mediump vec2 vLodTexCoord;	
IN lowp float vNumLights;		
IN highp vec4 vBaryCoords;		
layout(location = 0) inout lowp vec4 fragColor;		
lowp vec4 fragColor1;									
#define LAST_FRAG_COLOR fragColor						
#define LAST_FRAG_ALPHA fragColor.a					
lowp float snoise();
highp float writeDepth();
highp vec2 clampWrapMirror(in highp vec2 vTexCoord,	
	in highp vec2 vWrap, in highp vec2 vClamp,			
	in lowp vec"[libretro INFO] glsl_Utils.cpp:94, "2 vClampEn, in lowp vec2 vMirrorEn );	
void textureEngine0(in highp vec2 texCoord, out highp vec2 tcData[5]); 
void textureEngine1(in highp vec2 texCoord, out highp vec2 tcData[5]); 
#define READ_TEX(name, tex, tcData, fbMonochrome, fbFixedAlpha)	\
  {																\
  if (fbMonochrome == 3) {											\
    mediump ivec2 coord = ivec2(gl_FragCoord.xy);					\
    name = texelFetch(tex, coord, 0);								\
  } else {															\
    name = texelFetch(tex, ivec2(tcData[0]),0);					\
  }																\
  if (fbMonochrome == 1) name = vec4(name.r);						\
  else if (fbMonochrome == 2) 										\
    name.rgb = vec3(dot(vec3(0.2126, 0.7152, 0.0722), name.rgb));	\
  else if (fbMonochrome == 3) { 									\
    name.rgb = vec3(dot(vec3(0.2126, 0.7152, 0.0722), name.rgb));	\
    name.a ="[libretro INFO] glsl_Utils.cpp:94, " 0.0;													\
  }																\
  if (fbFixedAlpha == 1) name.a = 0.825;							\
  }																
void main() 
{			 
  highp float fragDepth = writeDepth();	
  lowp vec4 vec_color;				
  lowp float alpha1;				
  lowp vec3 color1, input_color;	
  lowp vec4 shadeColor = vShadeColorNoperspective;	
#define WRAP(x, low, high) (mod((x)-(low), (high)-(low)) + (low)) 
cvg = 1.0; 

 highp vec2 mTexCoord = vTexCoord + vec2(0.0001);						
 mTexCoord += uTexCoordOffset;											
 if (uUseTexCoordBounds != 0)											
 mTexCoord = clamp(mTexCoord, uTexCoordBounds.xy, uTexCoordBounds.zw);	
																		
textureEngine0(mTexCoord, tcData0); 
  lowp vec4 readtex0;																	
  READ_TEX(readtex0, uTex0, tcData0, uFbMonochrome[0], uFbFixedAlpha[0])			
  input_color = shadeColor.rgb"[libretro INFO] glsl_Utils.cpp:94, ";
  vec_color = vec4(input_color, shadeColor.a);
  alpha1 = (readtex0.a );
  if (uEnableAlphaTest != 0) {							
    lowp float alphaTestValue = (uAlphaCompareMode == 3) ? snoise() : uAlphaTestValue;	
    lowp float alphaValue;								
    if ((uAlphaCvgSel != 0) && (uCvgXAlpha == 0)) {	
      alphaValue = 0.125;								
    } else {											
      alphaValue = clamp(alpha1, 0.0, 1.0);			
    }													
    if (alphaValue < alphaTestValue) discard;			
  }													
  color1 = (readtex0.rgb );
  if (uCvgXAlpha != 0 && alpha1 < 0.125) discard;
  lowp vec4 cmbRes = vec4(color1, alpha1);
  lowp vec4 clampedColor = clamp(cmbRes, 0.0, 1.0);
  fragColor = clampedColor;

  if (uRenderTarget == 1) {					
    fragDepth = fragColor.r;					
  } else if (uRenderTarget == 2) {				
    ivec2 coo"[libretro INFO] glsl_Utils.cpp:94, "rd = ivec2(gl_FragCoord.xy);		
    if (fragDepth >= texelFetch(uDepthTex, coord, 0).r) discard;	
    fragDepth = fragColor.r;					
  }											
  gl_FragDepth = fragDepth;	
} 

highp vec2 clampWrapMirror(in highp vec2 vTexCoord, in highp vec2 vWrap,		
	in highp vec2 vClamp, in lowp vec2 vWrapEn, in lowp vec2 vClampEn, in lowp vec2 vMirrorEn)		
{																				
	highp vec2 texCoord = vTexCoord;											
	highp vec2 clampedCoord = clamp(texCoord, vec2(0.0), vClamp);				
	texCoord += vClampEn*(clampedCoord-texCoord);								
   lowp vec2 needMirror = step(vWrap, mod(texCoord, 2.0*vWrap));				
	highp vec2 invertedCoord = mod(-texCoord-vec2(1.0), vWrap);	 				
	texCoord += vMirrorEn*needMirror*(invertedCoord-texCoord);	 				
   highp vec2 wrappedCoord = mod(texCoord,vWrap);								
	te"[libretro INFO] glsl_Utils.cpp:94, "xCoord += vWrapEn*(wrappedCoord-texCoord);								
	return texCoord;															
}																				
highp vec2 wrap2D(in highp vec2 tc, in highp vec2 size)						
{																				
  highp float divs = floor(tc.s / size.s);										
  highp float divt = floor((tc.t + divs) / size.t);							
  return vec2(tc.s - divs * size.s, tc.t + divs - divt*size.t);				
}																				
void textureEngine0(in highp vec2 texCoord, out highp vec2 tcData[5]) 
{  
  highp vec2 tileCoord = (WRAP(texCoord * uShiftScale[0] - uTexOffset[0], -1024.0, 1024.0));
  tileCoord = (tileCoord + uBilinearOffset) * uHDRatio[0] - uBilinearOffset; 
  mediump vec2 intPart = floor(tileCoord); 
  highp vec2 tc00 = clampWrapMirror(intPart, uTexWrap[0], uTexClamp[0], uTexWrapEn[0], uTexClampEn[0], uTexMirrorEn[0]"[libretro INFO] glsl_Utils.cpp:94, "); 
  highp vec2 tc11 = clampWrapMirror(intPart + vec2(1.0,1.0), uTexWrap[0], uTexClamp[0], uTexWrapEn[0], uTexClampEn[0], uTexMirrorEn[0]); 
  tcData[0] = wrap2D(tc00, uTexSize[0]) + uCacheOffset[0]; 
  tcData[3] = wrap2D(tc11, uTexSize[0]) + uCacheOffset[0]; 
  tcData[1] = vec2(tcData[0].s, tcData[3].t); 
  tcData[2] = vec2(tcData[3].s, tcData[0].t); 
  tcData[4] = tileCoord - intPart; 
}  
void textureEngine1(in highp vec2 texCoord, out highp vec2 tcData[5]) 
{  
  highp vec2 tileCoord = (WRAP(texCoord * uShiftScale[1] - uTexOffset[1], -1024.0, 1024.0)); 
  tileCoord = (tileCoord + uBilinearOffset) * uHDRatio[1] - uBilinearOffset; 
  mediump vec2 intPart = floor(tileCoord); 
  highp vec2 tc00 = clampWrapMirror(intPart, uTexWrap[1], uTexClamp[1], uTexWrapEn[1], uTexClampEn[1], uTexMirror"[libretro INFO] glsl_Utils.cpp:94, "En[1]); 
  highp vec2 tc11 = clampWrapMirror(intPart + vec2(1.0,1.0), uTexWrap[1], uTexClamp[1], uTexWrapEn[1], uTexClampEn[1], uTexMirrorEn[1]); 
  tcData[0] = wrap2D(tc00, uTexSize[1]) + uCacheOffset[1]; 
  tcData[3] = wrap2D(tc11, uTexSize[1]) + uCacheOffset[1]; 
  tcData[1] = vec2(tcData[0].s, tcData[3].t); 
  tcData[2] = vec2(tcData[3].s, tcData[0].t); 
  tcData[4] = tileCoord - intPart; 
}  
uniform mediump float uNoiseSeed;						
lowp float snoise()									
{														
  highp vec2 coord = floor(gl_FragCoord.xy/uScreenScale);
  highp vec3 p3 = vec3(uNoiseSeed, coord);				
  p3 = fract(p3 * .1031);								
  p3 += dot(p3, p3.zyx + 31.32);						
  return fract((p3.x + p3.y) * p3.z);					
}														
highp float writeDepth()						        									
{																							
  if"[libretro INFO] glsl_Utils.cpp:91, " (uDepthSource != 0) return uPrimDepth;												
  return clamp((gl_FragCoord.z * 2.0 - 1.0) * uDepthScale.s + uDepthScale.t, 0.0, 1.0);	
}																							
"[libretro INFO] glsl_Utils.cpp:64, "shader_link error: error: linking with uncompiled/unspecialized shader"retroarch: GLideN64/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp:514: graphics::CombinerProgram* glsl::CombinerProgramBuilder::buildCombinerProgram(Combiner&, Combiner&, const CombinerKey&): Assertion `Utils::checkProgramLinkStatus(program)' failed.

This might indicate a problem with a shader. Unfortunatelly, I can't really tell. Note that this output got generated after retroarch's config directory got cleared completely (including the system subdirectory).

I also observed, that by forcefully setting ext_fetch to false in the (otherwise unpatched) code, the bug disappears.

Got a list of your supported gl extensions?

Not sure how to get that -- does the following answer that question?

Output of glxinfo

name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_context_flush_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 
    GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, 
    GLX_EXT_get_drawable_type, GLX_EXT_libglvnd, GLX_EXT_no_config_context, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_MESA_copy_sub_buffer, GLX_OML_swap_method, GLX_SGIS_multisample, 
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, 
    GLX_SGI_make_current_read
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_context_flush_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, 
    GLX_ATI_pixel_format_float, GLX_EXT_buffer_age, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 
    GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, 
    GLX_EXT_import_context, GLX_EXT_no_config_context, GLX_EXT_swap_control, 
    GLX_EXT_swap_control_tear, GLX_EXT_texture_from_pixmap, 
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, 
    GLX_MESA_copy_sub_buffer, GLX_MESA_gl_interop, GLX_MESA_query_renderer, 
    GLX_MESA_swap_control, GLX_NV_float_buffer, GLX_OML_sync_control, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
    GLX_ARB_context_flush_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, 
    GLX_EXT_buffer_age, GLX_EXT_create_context_es2_profile, 
    GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float, 
    GLX_EXT_framebuffer_sRGB, GLX_EXT_no_config_context, GLX_EXT_swap_control, 
    GLX_EXT_swap_control_tear, GLX_EXT_texture_from_pixmap, 
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, 
    GLX_MESA_gl_interop, GLX_MESA_query_renderer, GLX_MESA_swap_control, 
    GLX_OML_sync_control, GLX_SGIS_multisample, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, 
    GLX_SGI_video_sync
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel (0x8086)
    Device: Mesa Intel(R) UHD Graphics 630 (CML GT2) (0x9bc5)
    Version: 25.2.6
    Accelerated: yes
    Video memory: 64088MB
    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 630 (CML GT2)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 25.2.6
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth, 
    GL_AMD_depth_clamp_separate, GL_AMD_draw_buffers_blend, 
    GL_AMD_gpu_shader_int64, GL_AMD_multi_draw_indirect, 
    GL_AMD_performance_monitor, GL_AMD_pinned_memory, 
    GL_AMD_query_buffer_object, GL_AMD_seamless_cubemap_per_texture, 
    GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax, 
    GL_AMD_texture_texture4, GL_AMD_vertex_shader_layer, 
    GL_AMD_vertex_shader_viewport_index, GL_ANGLE_texture_compression_dxt3, 
    GL_ANGLE_texture_compression_dxt5, GL_ARB_ES2_compatibility, 
    GL_ARB_ES3_1_compatibility, GL_ARB_ES3_2_compatibility, 
    GL_ARB_ES3_compatibility, GL_ARB_arrays_of_arrays, GL_ARB_base_instance, 
    GL_ARB_blend_func_extended, GL_ARB_buffer_storage, 
    GL_ARB_clear_buffer_object, GL_ARB_clear_texture, GL_ARB_clip_control, 
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader, 
    GL_ARB_compute_variable_group_size, GL_ARB_conditional_render_inverted, 
    GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_copy_image, 
    GL_ARB_cull_distance, GL_ARB_debug_output, GL_ARB_depth_buffer_float, 
    GL_ARB_depth_clamp, GL_ARB_derivative_control, GL_ARB_direct_state_access, 
    GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend, 
    GL_ARB_draw_elements_base_vertex, GL_ARB_draw_indirect, 
    GL_ARB_draw_instanced, GL_ARB_enhanced_layouts, 
    GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location, 
    GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport, 
    GL_ARB_fragment_shader, GL_ARB_fragment_shader_interlock, 
    GL_ARB_framebuffer_no_attachments, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary, 
    GL_ARB_get_texture_sub_image, GL_ARB_gl_spirv, GL_ARB_gpu_shader5, 
    GL_ARB_gpu_shader_fp64, GL_ARB_gpu_shader_int64, GL_ARB_half_float_pixel, 
    GL_ARB_half_float_vertex, GL_ARB_indirect_parameters, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_internalformat_query2, GL_ARB_invalidate_subdata, 
    GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multi_bind, 
    GL_ARB_multi_draw_indirect, GL_ARB_occlusion_query2, 
    GL_ARB_parallel_shader_compile, GL_ARB_pipeline_statistics_query, 
    GL_ARB_pixel_buffer_object, GL_ARB_point_sprite, 
    GL_ARB_polygon_offset_clamp, GL_ARB_post_depth_coverage, 
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex, 
    GL_ARB_query_buffer_object, GL_ARB_robust_buffer_access_behavior, 
    GL_ARB_robustness, GL_ARB_sample_shading, GL_ARB_sampler_objects, 
    GL_ARB_seamless_cube_map, GL_ARB_seamless_cubemap_per_texture, 
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counter_ops, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_ballot, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_clock, 
    GL_ARB_shader_draw_parameters, GL_ARB_shader_group_vote, 
    GL_ARB_shader_image_load_store, GL_ARB_shader_image_size, 
    GL_ARB_shader_objects, GL_ARB_shader_precision, 
    GL_ARB_shader_stencil_export, GL_ARB_shader_storage_buffer_object, 
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_image_samples, 
    GL_ARB_shader_texture_lod, GL_ARB_shader_viewport_layer_array, 
    GL_ARB_shading_language_420pack, GL_ARB_shading_language_include, 
    GL_ARB_shading_language_packing, GL_ARB_spirv_extensions, 
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader, 
    GL_ARB_texture_barrier, GL_ARB_texture_border_clamp, 
    GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_object_rgb32, 
    GL_ARB_texture_buffer_range, GL_ARB_texture_compression_bptc, 
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map_array, 
    GL_ARB_texture_filter_anisotropic, GL_ARB_texture_float, 
    GL_ARB_texture_gather, GL_ARB_texture_mirror_clamp_to_edge, 
    GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two, 
    GL_ARB_texture_query_levels, GL_ARB_texture_query_lod, 
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, 
    GL_ARB_texture_stencil8, GL_ARB_texture_storage, 
    GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle, 
    GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2, 
    GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced, 
    GL_ARB_transform_feedback_overflow_query, GL_ARB_uniform_buffer_object, 
    GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object, 
    GL_ARB_vertex_attrib_64bit, GL_ARB_vertex_attrib_binding, 
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_shader, 
    GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev, 
    GL_ARB_viewport_array, GL_ATI_blend_equation_separate, 
    GL_ATI_texture_float, GL_EXT_EGL_image_storage, 
    GL_EXT_EGL_image_storage_compression, GL_EXT_EGL_sync, GL_EXT_abgr, 
    GL_EXT_blend_equation_separate, GL_EXT_debug_label, 
    GL_EXT_demote_to_helper_invocation, GL_EXT_draw_buffers2, 
    GL_EXT_draw_instanced, GL_EXT_framebuffer_blit, 
    GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled, 
    GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, GL_EXT_memory_object, 
    GL_EXT_memory_object_fd, GL_EXT_packed_depth_stencil, GL_EXT_packed_float, 
    GL_EXT_pixel_buffer_object, GL_EXT_polygon_offset_clamp, 
    GL_EXT_provoking_vertex, GL_EXT_semaphore, GL_EXT_semaphore_fd, 
    GL_EXT_shader_clock, GL_EXT_shader_framebuffer_fetch, 
    GL_EXT_shader_framebuffer_fetch_non_coherent, GL_EXT_shader_integer_mix, 
    GL_EXT_shader_samples_identical, GL_EXT_texture_array, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic, 
    GL_EXT_texture_integer, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_R8, 
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_shadow_lod, 
    GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm, 
    GL_EXT_texture_storage, GL_EXT_texture_swizzle, GL_EXT_timer_query, 
    GL_EXT_transform_feedback, GL_EXT_vertex_array_bgra, 
    GL_EXT_vertex_attrib_64bit, GL_IBM_multimode_draw_arrays, 
    GL_INTEL_blackhole_render, GL_INTEL_conservative_rasterization, 
    GL_INTEL_performance_query, GL_INTEL_shader_atomic_float_minmax, 
    GL_INTEL_shader_integer_functions2, GL_KHR_blend_equation_advanced, 
    GL_KHR_blend_equation_advanced_coherent, GL_KHR_context_flush_control, 
    GL_KHR_debug, GL_KHR_no_error, GL_KHR_parallel_shader_compile, 
    GL_KHR_robust_buffer_access_behavior, GL_KHR_robustness, 
    GL_KHR_texture_compression_astc_ldr, 
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_framebuffer_flip_y, 
    GL_MESA_pack_invert, GL_MESA_shader_integer_functions, 
    GL_MESA_texture_const_bandwidth, GL_MESA_texture_signed_rgba, 
    GL_NV_alpha_to_coverage_dither_control, GL_NV_compute_shader_derivatives, 
    GL_NV_conditional_render, GL_NV_copy_image, GL_NV_depth_clamp, 
    GL_NV_fragment_shader_interlock, GL_NV_packed_depth_stencil, 
    GL_NV_texture_barrier, GL_OES_EGL_image, GL_S3_s3tc

OpenGL version string: 4.6 (Compatibility Profile) Mesa 25.2.6
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth, 
    GL_AMD_depth_clamp_separate, GL_AMD_draw_buffers_blend, 
    GL_AMD_multi_draw_indirect, GL_AMD_performance_monitor, 
    GL_AMD_pinned_memory, GL_AMD_query_buffer_object, 
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export, 
    GL_AMD_shader_trinary_minmax, GL_AMD_texture_texture4, 
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_viewport_index, 
    GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, 
    GL_APPLE_packed_pixels, GL_ARB_ES2_compatibility, 
    GL_ARB_ES3_1_compatibility, GL_ARB_ES3_2_compatibility, 
    GL_ARB_ES3_compatibility, GL_ARB_arrays_of_arrays, GL_ARB_base_instance, 
    GL_ARB_blend_func_extended, GL_ARB_buffer_storage, 
    GL_ARB_clear_buffer_object, GL_ARB_clear_texture, GL_ARB_clip_control, 
    GL_ARB_color_buffer_float, GL_ARB_compatibility, 
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader, 
    GL_ARB_compute_variable_group_size, GL_ARB_conditional_render_inverted, 
    GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_copy_image, 
    GL_ARB_cull_distance, GL_ARB_debug_output, GL_ARB_depth_buffer_float, 
    GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_derivative_control, 
    GL_ARB_direct_state_access, GL_ARB_draw_buffers, 
    GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex, 
    GL_ARB_draw_indirect, GL_ARB_draw_instanced, GL_ARB_enhanced_layouts, 
    GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location, 
    GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport, 
    GL_ARB_fragment_program, GL_ARB_fragment_program_shadow, 
    GL_ARB_fragment_shader, GL_ARB_fragment_shader_interlock, 
    GL_ARB_framebuffer_no_attachments, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary, 
    GL_ARB_get_texture_sub_image, GL_ARB_gl_spirv, GL_ARB_gpu_shader5, 
    GL_ARB_gpu_shader_fp64, GL_ARB_gpu_shader_int64, GL_ARB_half_float_pixel, 
    GL_ARB_half_float_vertex, GL_ARB_indirect_parameters, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_internalformat_query2, GL_ARB_invalidate_subdata, 
    GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multi_bind, 
    GL_ARB_multi_draw_indirect, GL_ARB_multisample, GL_ARB_multitexture, 
    GL_ARB_occlusion_query, GL_ARB_occlusion_query2, 
    GL_ARB_parallel_shader_compile, GL_ARB_pipeline_statistics_query, 
    GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, 
    GL_ARB_polygon_offset_clamp, GL_ARB_post_depth_coverage, 
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex, 
    GL_ARB_query_buffer_object, GL_ARB_robust_buffer_access_behavior, 
    GL_ARB_robustness, GL_ARB_sample_shading, GL_ARB_sampler_objects, 
    GL_ARB_seamless_cube_map, GL_ARB_seamless_cubemap_per_texture, 
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counter_ops, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_ballot, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_clock, 
    GL_ARB_shader_draw_parameters, GL_ARB_shader_group_vote, 
    GL_ARB_shader_image_load_store, GL_ARB_shader_image_size, 
    GL_ARB_shader_objects, GL_ARB_shader_precision, 
    GL_ARB_shader_stencil_export, GL_ARB_shader_storage_buffer_object, 
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_image_samples, 
    GL_ARB_shader_texture_lod, GL_ARB_shader_viewport_layer_array, 
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack, 
    GL_ARB_shading_language_include, GL_ARB_shading_language_packing, 
    GL_ARB_shadow, GL_ARB_spirv_extensions, GL_ARB_stencil_texturing, 
    GL_ARB_sync, GL_ARB_tessellation_shader, GL_ARB_texture_barrier, 
    GL_ARB_texture_border_clamp, GL_ARB_texture_buffer_object, 
    GL_ARB_texture_buffer_object_rgb32, GL_ARB_texture_buffer_range, 
    GL_ARB_texture_compression, GL_ARB_texture_compression_bptc, 
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map, 
    GL_ARB_texture_cube_map_array, GL_ARB_texture_env_add, 
    GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar, 
    GL_ARB_texture_env_dot3, GL_ARB_texture_filter_anisotropic, 
    GL_ARB_texture_float, GL_ARB_texture_gather, 
    GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_mirrored_repeat, 
    GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two, 
    GL_ARB_texture_query_levels, GL_ARB_texture_query_lod, 
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, 
    GL_ARB_texture_stencil8, GL_ARB_texture_storage, 
    GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle, 
    GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2, 
    GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced, 
    GL_ARB_transform_feedback_overflow_query, GL_ARB_transpose_matrix, 
    GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, 
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_64bit, 
    GL_ARB_vertex_attrib_binding, GL_ARB_vertex_buffer_object, 
    GL_ARB_vertex_program, GL_ARB_vertex_shader, 
    GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev, 
    GL_ARB_viewport_array, GL_ARB_window_pos, GL_ATI_blend_equation_separate, 
    GL_ATI_draw_buffers, GL_ATI_fragment_shader, GL_ATI_separate_stencil, 
    GL_ATI_texture_compression_3dc, GL_ATI_texture_env_combine3, 
    GL_ATI_texture_float, GL_EXT_EGL_image_storage, 
    GL_EXT_EGL_image_storage_compression, GL_EXT_EGL_sync, GL_EXT_abgr, 
    GL_EXT_bgra, GL_EXT_blend_color, GL_EXT_blend_equation_separate, 
    GL_EXT_blend_func_separate, GL_EXT_blend_minmax, GL_EXT_blend_subtract, 
    GL_EXT_compiled_vertex_array, GL_EXT_copy_texture, GL_EXT_debug_label, 
    GL_EXT_demote_to_helper_invocation, GL_EXT_direct_state_access, 
    GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements, 
    GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, 
    GL_EXT_framebuffer_multisample_blit_scaled, GL_EXT_framebuffer_object, 
    GL_EXT_framebuffer_sRGB, GL_EXT_gpu_program_parameters, 
    GL_EXT_gpu_shader4, GL_EXT_memory_object, GL_EXT_memory_object_fd, 
    GL_EXT_multi_draw_arrays, GL_EXT_packed_depth_stencil, 
    GL_EXT_packed_float, GL_EXT_packed_pixels, GL_EXT_pixel_buffer_object, 
    GL_EXT_point_parameters, GL_EXT_polygon_offset_clamp, 
    GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_semaphore, GL_EXT_semaphore_fd, GL_EXT_separate_specular_color, 
    GL_EXT_shader_clock, GL_EXT_shader_framebuffer_fetch, 
    GL_EXT_shader_framebuffer_fetch_non_coherent, GL_EXT_shader_integer_mix, 
    GL_EXT_shader_samples_identical, GL_EXT_shadow_funcs, 
    GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_subtexture, 
    GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_array, 
    GL_EXT_texture_buffer_object, GL_EXT_texture_compression_dxt1, 
    GL_EXT_texture_compression_latc, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, 
    GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add, 
    GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, 
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer, 
    GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_texture_rectangle, 
    GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_R8, GL_EXT_texture_sRGB_decode, 
    GL_EXT_texture_shadow_lod, GL_EXT_texture_shared_exponent, 
    GL_EXT_texture_snorm, GL_EXT_texture_storage, GL_EXT_texture_swizzle, 
    GL_EXT_timer_query, GL_EXT_transform_feedback, GL_EXT_vertex_array, 
    GL_EXT_vertex_array_bgra, GL_EXT_vertex_attrib_64bit, 
    GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip, 
    GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate, 
    GL_INTEL_blackhole_render, GL_INTEL_performance_query, 
    GL_INTEL_shader_atomic_float_minmax, GL_INTEL_shader_integer_functions2, 
    GL_KHR_blend_equation_advanced, GL_KHR_blend_equation_advanced_coherent, 
    GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error, 
    GL_KHR_parallel_shader_compile, GL_KHR_robust_buffer_access_behavior, 
    GL_KHR_robustness, GL_KHR_texture_compression_astc_ldr, 
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_framebuffer_flip_y, 
    GL_MESA_pack_invert, GL_MESA_shader_integer_functions, 
    GL_MESA_texture_const_bandwidth, GL_MESA_texture_signed_rgba, 
    GL_MESA_window_pos, GL_NV_ES1_1_compatibility, 
    GL_NV_alpha_to_coverage_dither_control, GL_NV_blend_square, 
    GL_NV_compute_shader_derivatives, GL_NV_conditional_render, 
    GL_NV_copy_depth_to_color, GL_NV_copy_image, GL_NV_depth_clamp, 
    GL_NV_fog_distance, GL_NV_fragment_shader_interlock, GL_NV_half_float, 
    GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, 
    GL_NV_primitive_restart, GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_OES_EGL_image, 
    GL_OES_read_format, GL_S3_s3tc, GL_SGIS_generate_mipmap, 
    GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp, 
    GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 25.2.6
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:
    GL_AMD_performance_monitor, GL_ANDROID_extension_pack_es31a, 
    GL_ANGLE_pack_reverse_row_order, GL_ANGLE_texture_compression_dxt3, 
    GL_ANGLE_texture_compression_dxt5, GL_APPLE_sync, 
    GL_APPLE_texture_max_level, GL_EXT_EGL_image_storage, 
    GL_EXT_EGL_image_storage_compression, GL_EXT_base_instance, 
    GL_EXT_blend_func_extended, GL_EXT_blend_minmax, GL_EXT_buffer_storage, 
    GL_EXT_clear_texture, GL_EXT_clip_control, GL_EXT_clip_cull_distance, 
    GL_EXT_color_buffer_float, GL_EXT_color_buffer_half_float, 
    GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_conservative_depth, 
    GL_EXT_copy_image, GL_EXT_debug_label, GL_EXT_demote_to_helper_invocation, 
    GL_EXT_depth_clamp, GL_EXT_discard_framebuffer, 
    GL_EXT_disjoint_timer_query, GL_EXT_draw_buffers, 
    GL_EXT_draw_buffers_indexed, GL_EXT_draw_elements_base_vertex, 
    GL_EXT_draw_instanced, GL_EXT_float_blend, GL_EXT_frag_depth, 
    GL_EXT_geometry_point_size, GL_EXT_geometry_shader, GL_EXT_gpu_shader5, 
    GL_EXT_instanced_arrays, GL_EXT_map_buffer_range, GL_EXT_memory_object, 
    GL_EXT_memory_object_fd, GL_EXT_multi_draw_arrays, 
    GL_EXT_multi_draw_indirect, GL_EXT_occlusion_query_boolean, 
    GL_EXT_polygon_offset_clamp, GL_EXT_primitive_bounding_box, 
    GL_EXT_read_format_bgra, GL_EXT_render_snorm, GL_EXT_robustness, 
    GL_EXT_sRGB_write_control, GL_EXT_semaphore, GL_EXT_semaphore_fd, 
    GL_EXT_separate_shader_objects, GL_EXT_shader_clock, 
    GL_EXT_shader_framebuffer_fetch, 
    GL_EXT_shader_framebuffer_fetch_non_coherent, GL_EXT_shader_group_vote, 
    GL_EXT_shader_implicit_conversions, GL_EXT_shader_integer_mix, 
    GL_EXT_shader_io_blocks, GL_EXT_shader_samples_identical, 
    GL_EXT_shadow_samplers, GL_EXT_tessellation_point_size, 
    GL_EXT_tessellation_shader, GL_EXT_texture_border_clamp, 
    GL_EXT_texture_buffer, GL_EXT_texture_compression_bptc, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_compression_s3tc_srgb, 
    GL_EXT_texture_cube_map_array, GL_EXT_texture_filter_anisotropic, 
    GL_EXT_texture_format_BGRA8888, GL_EXT_texture_mirror_clamp_to_edge, 
    GL_EXT_texture_norm16, GL_EXT_texture_query_lod, GL_EXT_texture_rg, 
    GL_EXT_texture_sRGB_R8, GL_EXT_texture_sRGB_decode, 
    GL_EXT_texture_shadow_lod, GL_EXT_texture_storage, 
    GL_EXT_texture_storage_compression, GL_EXT_texture_type_2_10_10_10_REV, 
    GL_EXT_texture_view, GL_EXT_unpack_subimage, GL_INTEL_blackhole_render, 
    GL_INTEL_conservative_rasterization, GL_INTEL_performance_query, 
    GL_KHR_blend_equation_advanced, GL_KHR_blend_equation_advanced_coherent, 
    GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error, 
    GL_KHR_parallel_shader_compile, GL_KHR_robust_buffer_access_behavior, 
    GL_KHR_robustness, GL_KHR_texture_compression_astc_ldr, 
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_bgra, 
    GL_MESA_framebuffer_flip_y, GL_MESA_sampler_objects, 
    GL_MESA_shader_integer_functions, GL_MESA_texture_const_bandwidth, 
    GL_NV_alpha_to_coverage_dither_control, GL_NV_compute_shader_derivatives, 
    GL_NV_conditional_render, GL_NV_draw_buffers, GL_NV_fbo_color_attachments, 
    GL_NV_fragment_shader_interlock, GL_NV_generate_mipmap_sRGB, 
    GL_NV_image_formats, GL_NV_pack_subimage, GL_NV_pixel_buffer_object, 
    GL_NV_read_buffer, GL_NV_read_depth, GL_NV_read_depth_stencil, 
    GL_NV_read_stencil, GL_NV_shader_noperspective_interpolation, 
    GL_NV_texture_barrier, GL_OES_EGL_image, GL_OES_EGL_image_external, 
    GL_OES_EGL_image_external_essl3, GL_OES_EGL_sync, 
    GL_OES_compressed_ETC1_RGB8_texture, GL_OES_copy_image, GL_OES_depth24, 
    GL_OES_depth_texture, GL_OES_depth_texture_cube_map, 
    GL_OES_draw_buffers_indexed, GL_OES_draw_elements_base_vertex, 
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap, 
    GL_OES_geometry_point_size, GL_OES_geometry_shader, 
    GL_OES_get_program_binary, GL_OES_gpu_shader5, GL_OES_mapbuffer, 
    GL_OES_packed_depth_stencil, GL_OES_primitive_bounding_box, 
    GL_OES_required_internalformat, GL_OES_rgb8_rgba8, GL_OES_sample_shading, 
    GL_OES_sample_variables, GL_OES_shader_image_atomic, 
    GL_OES_shader_io_blocks, GL_OES_shader_multisample_interpolation, 
    GL_OES_standard_derivatives, GL_OES_stencil8, GL_OES_surfaceless_context, 
    GL_OES_tessellation_point_size, GL_OES_tessellation_shader, 
    GL_OES_texture_3D, GL_OES_texture_border_clamp, GL_OES_texture_buffer, 
    GL_OES_texture_cube_map_array, GL_OES_texture_float, 
    GL_OES_texture_float_linear, GL_OES_texture_half_float, 
    GL_OES_texture_half_float_linear, GL_OES_texture_npot, 
    GL_OES_texture_stencil8, GL_OES_texture_storage_multisample_2d_array, 
    GL_OES_texture_view, GL_OES_vertex_array_object, GL_OES_vertex_half_float, 
    GL_OES_viewport_array

336 GLX Visuals
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  sw cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b ap eat
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576 GLXFBConfigs:
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  sw cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b ap eat
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Thanks for having a look at that, @m4xw ! I'm sorry I'm not more helpful here.

[m4xw]

you are very helpful, thats all info's i need. I'll take a look next week