drivers - xrandr missing default screen resolution on kubuntu 16.04 for external video card

I know I know, there are tons of questions regarding unrecognized screen resolutions, using xrandr, installing Nvidia drivers and related.

My new system is running Kubuntu 16.04, with kernel version 4.4.0-generic. It is a custom built computer, running an external video card, EVGA 1060 GTX 3GB model.

Following advices in this "guide": How do I install the Nvidia drivers? I was able to install the latest nvidia-370.

Now, on the ASUS monitor I am currently at (ASUS VS247H), the resolution should be 1920x1080, but only a maximum of 1024x768 is shown if running xrandr -q

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768

default connected primary 1024x768+0+0 0mm x 0mm
   1024x768      76.00*

Things I tried so far:

1)-------------------------------

The first thing that bothered me from the above was the line

xrandr: Failed to get size of gamma for output default

I tried some things, for example the first answer of this question here: "Fails to get size of gamma" error when trying to set resolution, which did not have any effect.

Then I realized that I had no file under /etc/X11/xorg.conf did not exist, and yet another answer at the site popped up: /etc/X11/xorg.conf doesn't exist?

Fazit: I tried generating my own as described in the first answer of this question: Where is the X.org config file? How do I configure X there? and then manually set a Screen with the correct resolution, without success.

2)-------------------------------

As mentioned in this guide about xrandr, I tried using

cvt 1920 1080 60
xrandr --newmode 

xrandr --addmode HDMI1 1920x1080_60.00

But still, the above

xrandr: Failed to get size of gamma for output default

seems to be killing me.

wow , nice graphics card !

its supported by the 367.27 which is supposed to be stable on day one according to phoronix.

http://www.phoronix.com/scan.php?page=article&item=nv-linux-gtx1060&num=1 

heres the nvidia driver ,

http://www.nvidia.com/download/driverresults.aspx/104284/en-us

but i'd recommend using the graphics-drivers-ppa version as it will be less fiddly to install and upgrade.

https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa

There instructions on how to install on that page.