README.win32: Add note on using OpenGL on Windows

...when running on a system with nVidia graphics with Nahimic installed, since
a known issue within the graphics drivers and/or Nahimic can cause random
crashes and issues when OpenGL (G[t|d]kGLArea) is being used.

This will close issue #4113--sadly, this issue is an issue that is beyond our
reach to try fixing within GTK.

1 files changed, 16 insertions, 0 deletions

diff --git a/README.win32 b/README.win32
index 704f6f3caf..f208a49ed9 100644
--- a/README.win32
+++ b/README.win32
@@ -3,6 +3,22 @@ The Win32 backend in GTK+ is not as stable or correct as the X11 one.
 For prebuilt runtime and developer packages see

 http://ftp.gnome.org/pub/gnome/binaries/win32/

 

+Notes on using OpenGL (GtkGLArea/GdkGLArea) on Win32

+====================================================

+Note that on Windows, if one is running Nahimic 3 on a system with

+nVidia graphics, one needs to stop the "Nahimic service" or insert

+the GTK application into the Nahimic blacklist, as noted in

+https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/297952/nahimic-and-nvidia-drivers-conflict/2334568/

+if using programs that utilise GtkGLArea and/or GdkGLArea, or use

+GDK_GL=gles if you know that GLES support is enabled for the build.

+

+This is a known issue, as the above link indicates, and affects quite

+a number of applications--sadly, since this issue lies within the

+nVidia graphics driver and/or the Nahimic 3 code, we are not able

+to rememdy this on the GTK side; the best bet before trying the above

+workarounds is to try to update your graphics drivers and Nahimic

+installation.

+

 Building GTK+ on Win32

 ======================