title: GPU programming in Mathematica
body: <p>I have an ATI graphics card in my laptop running Ubuntu 10.10. I installed the OpenCL library and tried to run programs in the GPU through Mathematica.</p>
  
  <p>I imported the package "<a href="http://reference.wolfram.com/mathematica/OpenCLLink/tutorial/Overview.html" rel="nofollow">OpenCLLink</a>" and checked <a href="http://reference.wolfram.com/mathematica/OpenCLLink/ref/OpenCLQ.html" rel="nofollow">OpenCLQ</a>[] and it returned <code>True</code>
  but when I run the example from the introduction in Mathematica it doesn't work. All the program is supposed to do is double a vector. For example, with <code>doubleFun[{1,2,3},3]</code> the output should be {2,4,6}, but in my case the output is still the same: {1,2,3}.</p>
  
  <p>What might be the cause of this problem? Is it a configuration issue or something else?</p>