I have a desktop computer with Intel integrated GPU card and discrete AMD card (280x). I'm using Ubuntu 15.04.
I would like to configure Xorg to load and use intel driver only and dedicate AMD card to OpenCL tasks only. Is it possible?
I tried many things:
- Using Xorg auto-configuration (by removing xorg.conf file) makes the Xorg to load both fglrx and intel driver and crash (enters low resolution mode).
- Replacing fglrx with intel driver in xorg.conf makes Xorg start. But Ubuntu enters login loop. I've seen in some places that lightdm should be also reconfigured, but I'm not sure how to do it.