From c35a6725b99722d91b0ed6580546c27c8f0849ba Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Mon, 10 May 2021 20:37:13 +0100
Subject: [PATCH] x11: Always fall back to GLX on NVIDIA

At least until we can guarantee that EGL-X11 works fine there.
---
 gdk/x11/gdkglcontext-egl.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gdk/x11/gdkglcontext-egl.c b/gdk/x11/gdkglcontext-egl.c
index a2b195fc77..1836f19057 100644
--- a/gdk/x11/gdkglcontext-egl.c
+++ b/gdk/x11/gdkglcontext-egl.c
@@ -572,6 +572,15 @@ gdk_x11_screen_init_egl (GdkX11Screen *screen)
   if (!eglInitialize (edpy, &major, &minor))
     return FALSE;
 
+  /* While NVIDIA might support EGL, it might very well not support
+   * all the EGL subset we rely on; we should be looking at more
+   * EGL extensions, but for the time being, this is a blanket
+   * fallback to GLX
+   */
+  const char *vendor = eglQueryString (edpy, EGL_VENDOR);
+  if (g_strcmp0 (vendor, "NVIDIA Corporation") == 0)
+    return FALSE;
+
   display_x11->have_egl = TRUE;
   display_x11->egl_version = epoxy_egl_version (dpy);