NVIDIA

My NVIDIA was not working; I got Error: glXCreateContext failed. This error pops up in three cases:

  1. Bad installation
  2. Overwritten proprietary driver with Xorg (say, by upgrading Xorg)
  3. Dying video card

So to fix it.. first run glxinfo | grep -I renderer to double check on your machine. Usually re-installing would work but in my case, my video card was fried.