black screen - Xorg/GDM config - Nvidia Optimus?

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https://bbs.archlinux.org – first at all check lspci | grep -i vgaI have optimus and I see both cards, Intel and nVidia.What do you see?If you install xf86-video-intel instead of nvidia driver, does it work then? (backup & remove /etc/X11/xorg.conf then)I had to disable optimus and switch to my dedicated nVidia graphics card  in bios in order to make nvidia driver work.Now I'm using intel with bumblebee (optimus support for linux) & optimus enabled in bios, and bumblebee loads proprietary nvidia drivers when required.But I also have a thinkpad t510, I don't know if bumblebee works with your device. (HowTos)