Take for example SandyBridge Windows 10 inbox driver - 126.96.36.19959. Even if inbox drivers for at least older iGPUs if not all never include an OpenCL CPU runtime, the OpenCL CPU runtime 16.1.1 refuse to install anyway if the graphics driver is there, even if there is no GPU OpenCL support. So on clean, default installation of Windows you have to uninstall the graphics driver, install OpenCL CPU runtime quickly before Windows puts the driver back. You might struggle with this an hour or 2 until you are lucky enough to beat Windows in this race. This is incredibly annoying, as this affects even slightly newer hardware like IvyBridge when you want the latest and greatest OpenCL CPU runtime. OpenCL CPU runtime installer clearly needs improvement as there are some cases where it can be safely installed despite graphics driver presence.
Sorry to hear about the difficult install experience.
The dev team is looking into the standalone runtime install and agrees that the issues described in this thread should be processed as bugs.
As a temporary workaround, it may be possible to skip the 16.1.1 CPU-only install entirely. For an up-to-date CPU implementation, you could use the experimental 2.1 implementation. This is installed with the SDK, not a separate package.
I will stay with what I have now, that is two OpenCL platforms and 3 different devices, since I don't what to spend more time on configurations ( spent a lot already... ). My current OpenCL setups for Windows and Linux allow me to do what I need for an R&D.
Wise choice considering the uninstall process for OpenCL CPU runtime is similarly affected.
Here is a breakdown of the interaction between the graphics driver and standalone OpenCL CPU runtime based on user action, what it is currently and what it should be:
User action Actual behavior Expected behavior
Install OpenCL CPU only runtime Require graphics driver uninstall Require uninstall of OpenCL CPU runtime if already installed
Uninstall OpenCL CPU runtime Require graphics driver uninstall Nothing except potential file in use conditions
Uninstall graphics driver Removes OpenCL CPU runtime Let the user choose what to do or keep it
with no chance to keep it
Has this ever been resolved?
I'm running into the same issue. I have a Skylake core i7 platform, NVidia GForce 1080.
Downloaded the drivers for the CPU, but forced to uninstall the existing Intel drivers.
opencl tells me that i should uninstall intel graphics but i dont know if its safe,will it reinstall ( i use 64 bit ) and what should i do after i install opencl by uninstalling intel graphics?
Thanks for coming to the forums with this question and thanks for the interest.
Is uninstalling the graphics driver package necessary to meet your goals for OpenCL program execution?
Sidebar: Please note that OEMs and system vendors may provide their own packages containing Intel® Graphics Drivers, which have OpenCL runtimes... Consider these recommended priorities for obtaining a graphics driver package:
This problem persists in the February 2020 release version of the Graphics Driver. I can't install the 18.1 version of the CPU runtime even if I uninstall the grpahics driver.
It actually got worse because in the February 2020 version of the driver the OpenCL runtime no longer ships by default forcing people to install the CPU runtime manually which I am stuck on due to this bug.
The reason I want the CPU runtime is because I want to debug OpenCL kernels on the CPU rather than the GPU.
Any help would be greatly appreciated.