Originally Posted by mark45
So the proprietary AMD driver uses its own version of glx and I'm pretty sure the proprietary Nvidia driver does that, too. The patch which is talked about here patches xorgs glx module so it's in fact for the open source drivers only.
$ cat /var/log/Xorg.0.log | grep glx
[ 11.758] (II) "glx" will be loaded by default.
[ 11.770] (II) LoadModule: "glx"
[ 11.770] (II) Loading /usr/lib64/xorg/modules/extensions/libglx.so
[ 11.775] (II) Module glx: vendor="Advanced Micro Devices, Inc."
//EDIT: glx is a part of the OpenGL implementation:
$ cat /var/log/Xorg.0.log | grep GLX
[ 11.776] (II) Loading extension GLX
[ 12.487] (II) AIGLX: Loaded and initialized OpenGL driver(II) GLX: Initialized DRI GL provider for screen 0