[administration][graphics] List Mesa OpenGL drivers

[LukeShortCloud]

These can be found in the /usr/lib/dri/ directory on Arch Linux.

$ export MESA_LOADER_DRIVER_OVERRIDE=<DRIVER>

https://docs.mesa3d.org/envvars.html

Drivers:

• crocus = Intel GPUs. It was originally built "for Broadwell graphics and newer" but is being backported to older generations. It is a replacement for botht he i965 and iris drivers.
  • https://www.phoronix.com/scan.php?page=news_item&px=Intel-Crocus-Default-Gallium3D
• i830, i915, i965, and iris = Intel GPUs.
• nouveau = NVIDIA GPU, open source.
• r200, r300, r600 = AMD GPUs, legacy.
• radeon, radeonsi = AMD GPUs, modern.
• swrast = Software/CPU rendering.
• vdpau (or sometimes symlinked to from "nvidia" and "s3g") = NVIDIA GPU, proprietary.
• virtio_gpu = VIrtIO virtualization.
• vmwgfx = VMware virtualization.
• zink = OpenGL to Vulkan.

[LukeShortCloud]

Partially resolved via: feef471d459af1a4e57a14f35ac2336b15e13e04