The following worked for me:
1. Install xserver-xorg-video-intel package and rebooting. This showed output on the second monitor in lower resolution.
2. Adding higher resolution via xrandr: sudo xrandr --addmode DP1 1920x1080
3. Using the Ubuntu settings, display module to switch to higher resolution.
The following worked for me:
1. Install xserver- xorg-video- intel package and rebooting.
This showed output on the second monitor in lower resolution.
2. Adding higher resolution via xrandr:
sudo xrandr --addmode DP1 1920x1080
3. Using the Ubuntu settings, display module to switch to higher resolution.