I'm looking to use OpenCL for Bitcoin mining. Obviously it is technologically possible to use a GPU and OpenCL without X; Windows machines do it all the time. I'm wondering if there is a way to use OpenCL on a graphics card on Linux or similar without installing/running X. About a year ago I read that this was not possible, but I figure that what I read may be incorrect and/or things may have changed in the last year.
Is it possible now? How can it be done? Would it provide any performance improvement (theoretical or actual) when mining Bitcoins?