Gfilui

I'm having an issue with Ubuntu 18.04, everything was working correctly 2 days ago, but I have just connected my laptop to some external displays and my built-in screen will not turn on.

I can see the screen in Gnome's display settings but I am unable to change the status to enabled/disabled.

Options displaying correctly

Using xrandr -q gives me:

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
eDP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
 1920x1080 60.01*+ 60.01 59.97 59.96 59.93 
 1680x1050 59.95 59.88 
 1600x1024 60.17 
 1400x1050 59.98 
 1600x900 59.99 59.94 59.95 59.82 
 1280x1024 60.02 
 1440x900 59.89 
 1400x900 59.96 59.88 
 1280x960 60.00 
 1440x810 60.00 59.97 
 1368x768 59.88 59.85 
 1360x768 59.80 59.96 
 1280x800 59.99 59.97 59.81 59.91 
 1152x864 60.00 
 1280x720 60.00 59.99 59.86 59.74 
 1024x768 60.04 60.00 
 960x720 60.00 
 928x696 60.05 
 896x672 60.01 
 1024x576 59.95 59.96 59.90 59.82 
 960x600 59.93 60.00 
 960x540 59.96 59.99 59.63 59.82 
 800x600 60.00 60.32 56.25 
 840x525 60.01 59.88 
 864x486 59.92 59.57 
 800x512 60.17 
 700x525 59.98 
 800x450 59.95 59.82 
 640x512 60.02 
 720x450 59.89 
 700x450 59.96 59.88 
 640x480 60.00 59.94 
 720x405 59.51 58.99 
 684x384 59.88 59.85 
 680x384 59.80 59.96 
 640x400 59.88 59.98 
 576x432 60.06 
 640x360 59.86 59.83 59.84 59.32 
 512x384 60.00 
 512x288 60.00 59.92 
 480x270 59.63 59.82 
 400x300 60.32 56.34 
 432x243 59.92 59.57 
 320x240 60.05 
 360x202 59.51 59.13 
 320x180 59.84 59.32 
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-2-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 476mm x 267mm
 1920x1080 60.00*+ 50.00 59.94 
 1680x1050 59.88 
 1600x900 75.00 60.00 
 1280x1024 75.02 70.00 60.02 
 1440x900 59.90 
 1366x768 59.79 
 1152x864 75.00 
 1280x720 60.00 50.00 59.94 
 1024x768 75.03 70.07 60.00 
 832x624 74.55 
 800x600 72.19 75.00 60.32 56.25 
 720x576 50.00 
 720x480 60.00 59.94 
 640x480 75.00 72.81 60.00 59.94 
 720x400 70.08 
DP-2-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 476mm x 267mm
 1920x1080 60.00*+ 50.00 59.94 
 1680x1050 59.88 
 1600x900 75.00 60.00 
 1280x1024 75.02 70.00 60.02 
 1440x900 59.90 
 1366x768 59.79 
 1152x864 75.00 
 1280x720 60.00 50.00 59.94 
 1024x768 75.03 70.07 60.00 
 832x624 74.55 
 800x600 72.19 75.00 60.32 56.25 
 720x576 50.00 
 720x480 60.00 59.94 
 640x480 75.00 72.81 60.00 59.94 
 720x400 70.08 
DP-2-3 disconnected (normal left inverted right x axis y axis)

Attempting to enable the screen via xrandr (xrandr --output eDP-1 --auto) yields the below:

Screens showing as mirrored

To me it looks like the screen is now enabled but has also become a mirrored display of screen 2, hence the "1 2".

System info:

OS: Ubuntu 18.04 LTS x86_64
Host: ThinkPad T580
Kernel: 4.15.0-22-generic
Resolution: 1920x1080, 1920x1080, 1920x1080
DE: GNOME 3.28.1
WM: GNOME Shell
CPU: Intel i5-8250U (8) @ 3.400GHz
GPU: Intel UHD Graphics 620
Memory: 2517MiB / 7477MiB

If anybody could help or point me in the right direction that would be a great help.

If you need any more info then just ask.

Thanks!

Open Settings > Devices > Displays, you will find all the options there.

In the part where the two screens are numbered, you can adjust which one you want to be the primary display by sliding the screens over each other with your mouse cursor.

Join Displays will allow you to use multiple displays at the same time.
Mirror will display the same thing in multiple displays.
Single display will allow you to use just one display.