AMD OpenCL does not detect Intel HD 4000 as a GPU device

Question

I have a laptop which comes with Intel HD 4000 graphics. I am running Ubuntu 12.04. Now, when I ran some opencl examples that come with the AMD OpenCL SDK, the SDK used the CPU, because no GPU device could be recognized.

The System Details screen shows "Graphics Intel® Ivybridge Mobile x86/MMX/SSE2". Running lspci shows:

$lspci -nnk | grep -iA3 vga 
00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor
Graphics Controller [8086:0166] (rev 09)
  Subsystem: Lenovo Device [17aa:2208]
  Kernel driver in use: i915
  Kernel modules: i915

I believe that this confirms that Intel HD 4000 is working on my machine. But I am not sure why it is not being recognized by the opencl examples as a GPU device. Please help.

Thank you.

Answer 1

The title of your question says it: you need to install Intel OpenCL SDK in order to run on an Intel GPU, since AMD OpenCL is targeted towards AMD GPUs. Download Intel OCL SDK here and make sure that your driver supports OpenCL.

Answer 2

Having the same problem. Installed Intel's SDK (opencl_runtime_14.2_x64_4.5.0.8). And it sees only the processor, no graphics card. (And it is actually strange -- I think I did run OpenCL on this same laptop's graphics couple years ago. Maybe an old version of SDK would catch the card.)

People say: "Intel doesn't supply OpenCL support for their GPUs under Linux."

And add: "go for beignet." Apparently, beignet is an open source project spawned by Intel for developing open driver by the community for Linux.