System information (version)

• OpenCV => 3.2
• Operating System / Platform => Windows 10
• Compiler => VS 2013

Detailed description

I set cv::ocl::setUseOpenCL(false); and verified using useOpenCL(). But my code is still using GPU when I use UMat. How can I stop using GPU? Temporarily I am using a workaround that uses Mat instead of UMat. UMat should not use GPU when ocl is not used.

Steps to reproduce

Just use UMat in your code. Do some computation. Set cv::ocl::setUseOpenCL(false).
I used GPU-Z to verify GPU load/usage.