Upgrading GLX in Debian 8.3 (Jessie)

Using java version 1.8.0_111, any program I write/run using the JavaFX library gives the following error:

> ES2 Prism: Error - reported GLX version = 1.2

GLX version 1.3 or higher is required

glxinfo gives:
> server glx vendor string: SGI

server glx version string: 1.2

client glx vendor string: Mesa Project and SGI

client glx version string: 1.4

GLX version: 1.2

OpenGL version string: 3.0 Mesa 10.3.2

OpenGL shading language version string: 1.30

I also see that my OpenGL renderer is "Gallium 0.4 on llvmpipe (LLM 3.5, 256 bits)"

Elsewhere on the web, people have upgraded their GLX version by installing drivers for their video cards (e.g. NVIDIA). What is the LINODE equivalent of doing that? Is there a better way to get to GLX version 1.3?

Thanks!