Exactly WHICH version string are you referring to?
$ nvidia-smi
Mon Nov 4 16:39:17 2019
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 430.50 Driver Version: 430.50 CUDA Version: 10.1 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce RTX 2060 Off | 00000000:01:00.0 On | N/A |
| 0% 42C P8 15W / 160W | 887MiB / 5931MiB | 5% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 1491 G /usr/lib/xorg/Xorg 367MiB |
| 0 4325 G compiz 358MiB |
| 0 22829 G freecad-daily 3MiB |
| 0 22858 G /usr/lib/firefox/firefox 4MiB |
| 0 22893 G /usr/lib/firefox/firefox 151MiB |
+-----------------------------------------------------------------------------+
$ glxinfo | grep -i version
server glx version string: 1.4
client glx version string: 1.4
GLX version: 1.4
OpenGL core profile version string: 4.5.0 NVIDIA 430.50
OpenGL core profile shading language version string: 4.50 NVIDIA
OpenGL version string: 4.6.0 NVIDIA 430.50
OpenGL shading language version string: 4.60 NVIDIA
OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 430.50
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
GL_EXT_shader_implicit_conversions, GL_EXT_shader_integer_mix,
Check which glx/mesa you have (I'm running 16.04/Xenial still):
$ dpkg --list | grep -i "glx"
ii libgl1-mesa-dev:amd64 18.0.5-0ubuntu0~16.04.1 amd64 free implementation of the OpenGL API -- GLX development files
ii libgl1-mesa-glx:amd64 18.0.5-0ubuntu0~16.04.1 amd64 free implementation of the OpenGL API -- GLX runtime
ii libxcb-glx0:amd64 1.11.1-1ubuntu1 amd64 X C Binding, glx extension
ii libxcb-glx0-dev:amd64 1.11.1-1ubuntu1 amd64 X C Binding, glx extension, development files