Phoronix: Not All Linux Users Want To Toke On LLVMpipe

OpenGL support is becoming an increasing hard requirement on the Linux desktop. Even if your hardware comes up short, more desktops are requiring GL support, which means falling back to the CPU-based LLVMpipe Gallium3D driver...

http://www.phoronix.com/vr.php?view=MTIxMTg