I'm on Archlinux using an old and dusty Nvidia card and I have never had any problems with WebGL so far. In fact, when I often share WebGL links with others the

I'm on Archlinux using an old and dusty Nvidia card and I have never had any problems with WebGL so far. In fact, when I often share WebGL links with others they complain about it bringing their computers to a crawl, and they're generally using a non linux OS. Mind you, things are probably drastically different for the poor souls who have to deal with ATI on linux. But in those cases, I'd say the problem is with ATI and not WebGL.