Manufacturer will be taking this in for repair. Thanks to those that tried to help.

I recently got a new Skylake laptop with 15.10 installed.

The problem is that since connecting my external monitor, I can't seem to be able to use the laptop's own display.

I've tried using mirrored display, turning on/off the different displays and using the proprietary and open source/Ubuntu drivers.

I've read several posts concerning dual displays here, but none of the solutions I've seen seem to work.

All software is up to date.

Update: xrandr -q shows DP1, HDMI1 and VIRTUAL1

HDMI1 is connected. The others aren't and commands like xrandr -d VIRTUALDISPLAY1 yield Can't open display [name]