I have a hybrid graphics setting with an Intel Graphics 4th Gen and an Nvidia GTX 960M.
I would like to use sometimes the nvidia card and at the same time have output to an external VGA or HDMI monitor.
I have tried to follow several guides: How to set up nVidia Optimus/Bumblebee in 14.04
How to install nVidia drivers with Bumblebee on Ubuntu 14.04
Blank screen after installing nvidia restricted driver
I have managed to install succesfully the nvidia drivers together with bumblebee, and not so succesfully using nvidia-prime (I cannot really switch to using only nvidia). But the biggest problem is that with or without nvidia, with or without bumblebee, even using the xorg nouveau packages, I do not get any output to external monitors.
This is what I get from xrandr:
~$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected primary 1920x1080+0+0 0mm x 0mm
1920x1080 0.00*
I have tried many possible solutions on the web, but still find this very confusing.
Thanks!
