Using 2 GPUs
After hours of trial and error, and googling for obscure, contradicting information I hope somebody can help...
I have ASUS R556L laptop with 2 GPUs: Intel and Nvidia 940M. On fresh Fedora install, system information tells me that Intel GPU is working. First question: how do I check if the other GPU is working with some apps? Should it work already with the open-source nouveau driver?
I decided I want the proprietary Nvidia driver, so I blacklisted nouveau, then downloaded and installed the right one from Nvidia site. After I installed it, all I got was black screen until I uninstalled. As I understand, the Nvidia GPU with that driver might be trying to work alone while only Intel GPU has access to the screen (?) How to solve this? Nvidia's manual isn't very helpful http://us.download.nvidia.com/XFree86...
Finally, I'm unsure whether or not my laptop supports Nvidia Optimus, as different guides propose different methods for checking that, giving different results. I tried installing Bumblebee, but I got black screen again (this time I couldn't fix by uninstalling, I had to reinstall Fedora). How to definitely check if I have Nvidia Optimus? If I do, do I need Bumblebee? How to install it properly?
I'd be grateful if somebody could shed some light on how my GPUs should be working together.
That is a wall of text with a lot of questions but very short on details. What video cards and what have you tried? You need to try bumblebee. To some extent, the fact that it does not work answers your question, in my experience it is somewhat spotty, sometimes it works, sometimes not.
See https://fedoraproject.org/wiki/Bumblebee and https://ask.fedoraproject.org/en/ques...