MATLAB: GPU and SSH

Question

I just got a new machine with an NVIDIA Quadro 4000 GPU and thought I would give GPU processing a try. I have installed Arch Linux with the proprietary NVIDIA drivers and CUDA packages and MATLAB R2011a. If I locally log into the machine and run

gpuDevice

everything looks good. I then tried to remotely log into the machine. I can log remotely with ssh -X, but I cannot get MATLAB to accept keyboard input. If I log in ssh -Y I can get the keyboard to work. In both cases

gpuDevice

fails with:

??? Error using ==> feval

No device supporting CUDA was found.

Error in ==> /usr/local/matlab/R2011a/toolbox/distcomp/gpu/+parallel/+internal/+gpu/currentDeviceIndex.p>currentDeviceIndex at 7

Error in ==> /usr/local/matlab/R2011a/toolbox/distcomp/gpu/+parallel/+internal/+gpu/deviceProperties.p>deviceProperties at 8

Error in ==> GPUDevice.GPUDevice>GPUDevice.current at 34

[props, E] = parallel.internal.gpu.deviceProperties();

Error in ==> gpuDevice at 18

dev = parallel.gpu.GPUDevice.current();

Given that it doesn't work, I see that maybe I need a Tesla and not a Quadro GPU. Anyone know if I bought the wrong GPU or if it is something else.

EDIT Based on Thomas's answer I can now report that

gpuDevice

works if ssh into the machine and then launch MATLAB as root.

Answer 1

COMPUTE=:0

Such an easy answer. Apparently you need to set the COMPUTE environment variable.